Cornwall (Cornish: Kernow)  is a Duchy in the extreme south west of the UK and includes the Isles of Scilly, considered the mystical home of the legendary King Arthur. Lying westwards beyond the River Tamar border with its nearest neighbour Devon, Cornwall is one of the more isolated and distinct parts of the United Kingdom but is one of the most popular with travellers and holiday-makers. Its relatively warm climate, long coastline, amazing scenery, and diverse Celtic heritage (combined with tales of smuggling and pirates!) go only part of the way to explaining its appeal. Cornwall is increasingly becoming a popular destination for those interested in cultural tourism due to its long association with visual and written arts, and enormous wealth of archaeology. Its mining heritage has recently been recognised by the United Nations (UNESCO). Cornwall has always been fiercely proud of its Celtic identity, and for many residents their Cornish identity supersedes their Englishness or Britishness.
The modern English name of the Duchy is thought to be derived from its old Celtic name, Kernou, or the Horn, from its projecting promontories; that it was latinized to Cornovia or Cornubia; that when the Saxons gave the name of Wealas (foreigners) to the Britons, they distinguished those who had retired into Kernou or Cornubia, by the name of Cornu-wealas; and their country was thus called Cornuwall or Cornwall . Cornwall is called Kernow in the Cornish language and many signs have Cornish language descriptions on them. However, everybody in Cornwall speaks English as their first language. The Cornish language is recognised internationally and has government funding, a thriving community of speakers and publishers and is making a successful come back, with the number of fluent speakers now increasing, being in the thousands.
Recent polls place Cornish identity amongst young people at around 40% regarding themselves as Cornish rather than English, with calls for a Cornish assembley or government by some. Some might take offense to being called English, though most will take it in good jest.
A common, somewhat derogatory term for tourists is emmet, a Cornish Dialect word meaning ant (you do tend to swarm everywhere). The Cornish word for ant is actually murrian. Be aware of locals recommending "Porthemmet Beach" - it simply means 'tourist beach', and it doesn't exist.
The Cornish have several patron saints rather than those recognised in other parts of the United Kingdom (Andrew, George, David etc) but the pre-eminent one is Saint Piran whose flag, black with a white cross, can be seen all across the Duchy and flown from not only private homes but also Government and public buildings as well as in most towns. Saint Piran's Day is widely celebrated on March 5th, not only in Cornwall but amongst the Cornish diaspora across the globe.
The stereotype of the Cornish as 'inbred' and 'backward' is a misconception and if repeated to a local is likely to cause embrassement and offence (and perhaps a smack). Cornwall is generally quite ethnically homogenous in comparison to most areas of the UK, and then Cornish people tend to hold onto traditional morals and lifestyles. They are also slightly more conservative than the UK as a whole and very patriotic. Cornwall has a strong Protestant heritage, where Methodism is the main denomination. Nearly every village has atleast one Methodist church: some small villages have more than one Methodist church and no church from any other denomination. It's common to be driving along a backroad and find a Methodist church in the middle of nowhere, with no houses or settlements in the vacinity or in a tiny hamlet of a couple houses, but it still holds regular Sunday services with good attendance.
Cornwall was a contributor to the industrial revolution, famous particularly for its tin-mining and has produced major writers, artists, scientists and musicians to current times. The Cornish are extremely proud of their history and heritage pre-dating the arrival of the English Anglo-Saxons in Britain, and many Cornish people are loyal to their Duchy. You may even see some Cornish people wearing kilts and playing Cornish pipes at cultural and other gatherings and Cornwall is recognised as a separate nation by many international organisations. One such popular organisation is Gorsedh Kernow, aimed at promoting Cornish culture and festivals such as Gorsedd.
Cornwall has a small but developing lesbian and gay community. Flamboyancy showed by men, may rise some eyebrows (or frowns) but for the most part is accepted. There is an annual Pride event in Truro.
Regular trains run on the main line from London Paddington (12 daily to Plymouth, 3 hours, 8 daily all the way through Cornwall to Penzance, 5 hours) Bristol, Birmingham etc. to Plymouth, Truro and Penzance. There are also a few branch lines, the most useful linking St Ives to the main line at St Erth, from Truro to Falmouth via Perranwell and Penryn, and from Newquay to Par. There is also an overnight sleeper train which runs Sun-Fri nights to/from London Paddington and Penzance.
For services to London Paddington and local trains, First Great Western are the operator. For long distance services to Bristol, the Midlands and the North, CrossCountry Trains operate.
Train from London take about 3 hr 20 min to Plymouth, and 5 hr 30 min to Penzance.
Cornwall can be accessed by road via the A30 which starts at the end of the M5 at Exeter. Cornwall can also be accessed from the A38, crossing the Tamar River at Plymouth via the Tamar Bridge. From London it's a 5-6 hour drive. On Saturdays in July & August and Easter bank holiday weekend roads can be busy, although a new 7-mile stretch of dual-carriageway at Goss Moor near Bodmin has helped to alleviate many of the long tail backs.
Cornwall is served well by National Express coach services from London Victoria coach station (9 hours, 3 daily) and other parts of the UK (Edinburgh - Glasgow - Penzance, 18 hours, 1 daily).
Megabus  also run a daily service (8 hours) from London Victoria through to Penzance stopping off at a few major towns in Cornwall. With ticket prices from £1 this is a very cheap option, the coaches are relatively comfortable, but expect them to be pretty much full.
Everybody in Cornwall speaks the English language as their native tongue. Centuries ago people in the Duchy were monolingual in Cornish, a Brythonic language, which is closely related to Breton and Welsh. It survived as a first-language tongue until the 19th century. Dolly Pentreath of Mousehole, who died in 1777, was the last person thought to have been monolingual in Cornish. The publication of Henry Jenner's "Handbook of the Cornish Language" in 1904 caused a resurgence of interest in the Cornish language, and it is now increasingly used. Several thousand Cornish people speak the language fluently, and several young people have grown up bilingual in both Cornish and English. Increasing areas of Cornwall have bi-lingual road signs in both English and Cornish and there is a full time language staff at Cornwall Council.
St. Michael's Mount lies offshore close to Penzance.
Ruins of Tintagel Castle
Cornwall boasts a large number of attractions for the traveller, many lying outside of cities and towns amidst the Cornish landscape:
Bude With a decent Atlantic swell, superb surfing on Bude's excellent beaches such as Summerleaze as well as nearby Widemouth bay and Crackington Haven. Smaller, friendlier, more laid back and less pretentious than its neighbours such as Padstow and Newquay, Bude has a mellow, relaxed feel that reflects its surfing heritage and culture. Good facilities too.
Bodmin Moor Within the 208sq kilometres of the Moor, is King Arthur's Hall, a megalithic monument and Brown Willy, the highest point in Cornwall at 417 m (1,368 ft). Dozmary Pool is a small beautiful lake, linked with the Arthurian Legend. There is also a reputed Beast of the Moor, a phantom-wild cat that haunts and stalks at night, but is similar in fantasy to the Loch Ness Monster.
The Eden Project, . Open Every day all year except Christmas Eve & Christmas day. 9AM 6PM (Last entry 4:30PM)). Near St Austell - a fabulous collection of flora from all over the planet housed in two 'space age' transparent domes.edit
Land's End - The extreme South-West where Britain meets the Atlantic head-on
The Lost Gardens of Heligan - 80 acres of stunning landscaped scenery with a huge complex of walled flower and vegetable gardens
Tintagel Castle- legendary birth place of the famous King Arthur and seat of the kings of Cornwall. Earl Richard of Cornwall and King of the Romans built the present medieval castle at the site. Ongoing excavations are revealing a Cornish royal seat of the period 400 to 700 AD.
Minack Theatre - a outdoor theatre built, by hand, into the side of cliff over looking the ocean; located near the village of Porthcurno, the theatre includes a museum and offers tours when there are no performances
The Tate St Ives - one of the four Tate Galleries in the UK - Modern Art
The National Maritime Museum Falmouth- home of the National Maritime Museum's small boat collection and other exhibits.
Penlee House- home of the famous Newlyn School of Art
Pencarrow House and Gardens- A large house near Wadebridge built in 1760 with extensive gardens.
Cornwall's Crealy Great Adventure Park, Crealy Great Adventure Park, Tredinnick, Wadebridge, Cornwall, PL27 7RA, ☎ 01841 540 276, . Great family days out at Cornwall's top theme park.edit
Cornish World, . Combining shopping and leisure. Browse and shop at Cornish Market World, while the children play at Kidzworld, Charlie's offers fun for young adults and The Kids' Academy is an Ofsted approved nursery, pre-school and holiday club.edit
The Hurlers (Cornish: Hr Carwynnen) are a group of three stone circles in Cornwall, similar but smaller to Stonehenge. The site is half-a-mile (0.8 km) west of the village of Minions on the eastern flank of Bodmin Moor, and approximately four miles (6 km) north of Liskeard. Each stellar alignment was given with tabulated declinations at a date some time in between the range of 2100 to 1500 BC!
The South West Coast Path - Which runs along the coastline of Britain’s south-west peninsula. The Cornish section is supposed to be the most scenic, particularly around Penwith and the Lizard. The trail takes walkers to busy towns, remote cliffs, beaches, heaths, farms and fishing villages. Walking along it is a great way to experience the region in all its variety. For more information on the coastal path .
The Camel trail - An 18 mile off-road cycle-track following the scenic estuary of the river Camel view the local council website 
Cornish Film Festival - held annually each November around Newquay. The 11th edition takes place 8-11th in 2012. 
Coasteering: Cornwall has many providers for what is the UK's fastest growing adventure activity. Grab a helmet, a wetsuit and prepare yourself as you swim, scramble and cliff-jump your way along stunning sections of the Cornish coast. There are many providers throughout the county, so search locally 
Cornwall has become recently famous for its Michelin starred seafood resturants, with Jamie Oliver and Rick Stein opening swanky resturants in the county/country. Cornwall arguably has the most distinct and finest cuisine of all Britian, and a number of regional specialities, such as:
The Cornish Pasty - a semi-circular pockets of soft or flakey pastry, usually filled with meat, turnip, onion and potatoes with a crimped crust to hold whilst munching.
Cornish Ice Cream - distinctly yellowish in colour, and rich in flavour, on account of high buttermilk content. Clotted cream is another product.
Cornish Cream Tea - splits with clotted cream and jam or treacle washed down by a pot of tea (note scones are more commonly employed in a Devon cream tea)
Cornish Gilliflower is a unique cultivar of apple, that was found in a cottage garden in Truro in early 19th C.
Cornwall has three main breweries which are available to drink in most pubs in Cornwall:
Skinners - Based in Truro. Tours of the brewery are available  for details.
Sharps - Based in Rock. They have a shop at the brewery  for details.
St Austell Brewery' - Based in St Austell. They have a museum and shop,  for details
Swanky beer, Australian-Cornish bottle-conditioned beer which has been reintroduced from South Australia's Copper Triangle (which has one of the largest Cornish communities abroad) back to the homeland. Cider is also popular in the region.
Cornwall is also well known for its production of mead wine (Honey Wine).
Because of its climate Cornwall also has a number of vineyards, and produces decent wine not to be sniffed at.
Camel valley vineyard - Guided tours are available see for details.
Note these festivals tend to not be public holidays and not all are celebrated fully across the Duchy.
AberFest - is a Celtic cultural festival celebrating “All things” Cornish and Breton that takes place biennially (every two years) in Cornwall at Easter. The AberFest Festival alternates with the Breizh – Kernow Festival that is held in Brandivy and Bignan in (Breizh/Bretagne – France) on the alternate years.
Allantide - (Cornish Kalan Gwav or Nos Kalan Gwav) is a Cornish festival that was traditionally celebrated on 31 October elsewhere known as Hallowe'en. Since 2009 many of the Allantide traditions are celebrated in Penzance as part of the town's Apple Day celebrations that take place in late October. Bobbing for apples is traditional, and candy Gilliflower apples has become a recent edition for the kids.
Chewidden Thursday - a festival celebrated by the tin miners of West Cornwall on the last clear Thursday before (i.e. at least one week before) Christmas.
Furry Dance - also known as The Flora, takes place in Helston, Cornwall, and is one of the oldest British customs still practised today. The dance is very well attended every year and people travel from all over the world to see it.
Golowan - (sometimes also Goluan or Gol-Jowan) is the Cornish language word for the Midsummer celebrations, widespread prior to the late 19th century and most popular in the Penwith area and in particular Penzance and Newlyn. The celebrations are conducted from the 23rd of June (St John's Eve) to the 28th of June (St Peter's Eve) each year, St Peter's Eve being the more popular in Cornish fishing communities. The celebrations are centred around the lighting of bonfires and fireworks and the performance of associated rituals, it has seen a resurgence with the neo-Pagan movement. Some towns have a street-parade during this period.
Guldize - ancient harvest festival in Autumn, which involved the 'crying of the neck' ritual where there would be chanting in the corn field. A revived Guldize celebration has been held in Penzance, and since 2010 in several other locations across Cornwall.
Montol Festival - is an annual heritage, arts and community festival in Penzance, Cornwall held between the 16th and 22nd of December each year
Mummer's Day - "Darkie Day" as it is sometimes known, is an ancient Cornish midwinter celebration that occurs every year on Boxing Day and New Year's Day in Padstow. Now considered somewhat 'un-PC' as people will paint themselves black.
Nickanan Night - traditionally held on the Monday before Lent. Sometimes called roguery night in West Cornwall, this event is an excuse for local youths to undertake acts of minor vandalism and play practical jokes on neighbours and family. The name Nickanan may come from the practice of knocking on doors and running away which is known as 'Nick Nack' in some parts of English speaking world. The eating of pea soup and salt bacon is also associated with this date.
Noze looan - is a style of Cornish-Celtic dance, and associated music and events similar to the Breton Fest, Noz. Noze Looan is late Cornish for "happy night"
'Obby 'Oss - held annually on May Day (1 May), mainly in Padstow, where there is large marching bands and traditional music. Attracts large crowds so show up early.
Royal Cornwall Show, is an agricultural show organised by The Royal Cornwall Agricultural Association, which takes place at the beginning of June each year, at Wadebridge in North Cornwall. The show lasts for three days and attracts approximately 120,000 visitors annually, making it one of Cornwall's major tourist attractions.
Picrous Day - celebrated by the tin miners of Cornwall on the 2nd Thursday before Christmas. Luxulyan hosts a particular big party.
Shrove Tuesday Hurling - "Cornish hurling" or "silverball" ((Cornish: Hyrlîan) is a medieval game once common throughout Cornwall but now only played in St Columb (Major) and St Ives. The St Columb's game takes place first on Pancake Day (moves around in February) and then again on the Saturday eleven days later. The game involves two teams of several hundred people (the 'townsmen' and the 'countrymen') who endeavour to carry a silver ball made of apple wood to goals set roughly two miles (3 km) apart, making the parish the largest pitch for a ball game anywhere in the world. The annual St. Ives hurling match happens on Feast Monday each February (the feast is on the Sunday nearest to February 3). Hurling also survives as a traditional part of Beating the bounds at Bodmin, played on the Moor every 5 years. The next one is in 2015.
St Piran's Day - (Cornish: Gool Peran) is the national day of Cornwall, held on 5 March every year. There is large parties wide-spread across the whole of Cornwall, with people dressing in the black, white and silver national colours. St. Piran's flag represents the Duchy and is the patron saint of tinminers, the largest historic industry of the county.
Tom Bawcock's Eve - 23rd of December, stargazey pies are traditionally consumed on this day. In mythology, pies were seen bizarrarely as the reason the devil stayed out of Cornwall.
Cornwall boast a large range of tourist accommodation, ranging from 5 star luxury hotels to B&Bs, guest houses and hostels. There is also a large number of serviced holiday cottages that can be rented from anything from a long weekend to upwards of a month.
There are Tourist Information Centres (TICs) in most major towns. Theses are normally run by the local council and can check latest availability on the day to save having to phone round a number of B&Bs and guest houses. Note that they are unbiased and won't express an opinion on accommodations, more than giving its tourist board rating and facilities.
Visitors to Cornwall should at all times be aware of the unpredictable and dangerous nature of some of the tides and currents around the Cornish coast and seek advice from local lifeguards before swimming or surfing. It should also be noted that there is a small chance of getting great white or tiger sharks off the south coast, but don't let this worry you as they are very very rarely seen, and there have been no known attacks.
Be very alert when driving at night as some roads, especially the A39 in North Cornwall, contain sudden hairpin bends that are deceptively sharp and are not illuminated by street lighting. There is also a risk of running over nocturnal wildlife. Use your headlights' full beam where possible and err on the side of caution.
Newquay in the summer attracts tens of thousands of tourists, and with that inevitably comes increased crime during the months of June, July and August. Particularly assault and muggings occur, usually at night and often down on some of Newquay's many beaches.
Crime rates are mostly low in Cornwall, but there are some impoverished areas of some towns where crime is more common. Occasionally, outsiders can attract attention in local pubs, but this is no worse than in other areas of the country.
If you are looking to use a mobile in Cornwall it might be a good idea to purchase a local sim card.
The main mobile networks are EE, Vodafone, Three and O2. However there are a host of MVNOs that use the infrastructure of these networks, these often offer plans tailored towards expat communities and tourist who wish to call abroad, the main players are LycaMobile, Lebara and giffgaff. Most of these sim cards can be picked up in local shops however giffgaff do not have shops and only post out sims to the UK - therefore if you'd like a giffgaff sim abroad you can order hereIf staying connected is a priority you may want to compare the data speeds of the networks, OpenSignal provide London coverage maps.