Llangollen is in Denbighshire in Wales.
The best way to arrive in Llangollen is by car or bus. The A5 (from London to Holyhead) runs through the town. It's worth noting that on busy weekends the car parks within the town centre quickly fill (both short and long term), and the narrow streets slow to a crawl.
If you want to use public transport then get a train to Ruabon and then take the number 5 bus to Llangollen. They run every 30 minutes during the working day. They usually leave from outside the train station but it's a good idea to walk down to the main road as some buses double as school-buses and don't go up to it. They also go around various housing estates and take significantly longer than the usual 20 minutes.
Llangollen is a small town and all the tourist attractions can be reached on foot. The town centre basically consists of one main street running between the A5 and A539, most of the other roads lead off this. There is cheap car-parking in the town-centre, just off the main street, but note that on busy weekends and holidays, it fills quickly.
- As you approach the town you'll see the Pontcysyllte aqueduct  carrying the Ellesmere Canal over the River Dee, its over a 100 feet high and a 1000 long. The aqueduct is quite an impressive sight, especially when you consider that it was built over 200 years ago.
- There is a ruined castle, Dinas Bran, just outside the town. It is an open site (i.e. no admission charge), and the view is worth the long walk/climb. It takes about 30 minutes to walk down from the castle, walking up will take longer depending on your level of fitness. The path is steep, stoney and littered with animal droppings so don't attempt it in dress shoes or open-toed sandals. The path starts near the canal wharf behind the A539.
- Visit Plas Newydd a half-timbered black and white house in its own grounds. The inside has been intricately carved and looks surreal to say the least!
- Every year Llangollen hosts an International Eisteddfod where people from all over the world take part in musical and dancing competitions. 
- The Llangollen Steam Railway departs from the station in the town. You can enjoy a 3-course meal on the train or just go for the ride.
- Horse-drawn canal boats are available 50 meters from the town center at weekends and during the summer. Make sure you sit on the right side of the boat and then you'll be able to look over the side and down a 100ft drop as you pass over the Pontcysyllte aqueduct!
- The fast flowing and rocky River Dee is popular with canoeists. You'll have to bring your own canoe though. There are steps down to the rocks which are a popular place for picnics and sunbathing during hot weather.
- The Horse Shoe Falls are a weir at the start of the canal. Just follow the towpath for about 2km from the canal wharf. The falls are only about a metre high so they're definitely a 'do' and not a 'see'. You can gain access to the river there and canoeists seem to take great pleasure going over them.
The town has the usual selection of gift shops that you'd expect to find in Wales. There are several antique shops.
There is an Aldi on the edge of the town near the end of the riverside walk. It's a good place to stock-up on cheap sandwiches, etc.
The town has a wide selection of restaurant types, including Indian, Italian and Chinese.
The Corn Mill - a little on the expensive side but with great views of the river and the steam railway opposite.
The chip-shop on the A5 (almost opposite the Co-Op) is a lot cheaper than the one in the town centre. You pay local prices not tourist prices.
Most of the pubs are worth a visit. The Bridge End Hotel is popular with decent food and drinks offers.
- There are a number of cheap Bed & Breakfasts in the town.
- The Wynnstay, Smithfield and Bridge End Hotels also offer cheap Bed & Breakfast accommodations.
- The Chainbridge Hotel and Wild Pheasant Hotel just outside the town are more up-market.
Carry on along the A539 - you'll end up going through the scenic horse-shoe pass  and the at the peak The Ponderosa Cafe Complex , though avoid this if you don't like heights!