Constanţa  (prounounced Constantza) and  is a coastal Black Sea town in southern Dobruja, Romania, the second most important city in the country and, during summer, a beautiful touristic city. It is the capital of Constanta county and Romania's largest seaport, a great city to begin to explore the wonders of the sea.
Constanta, founded as a colony almost 2600 years ago, is the oldest attested city in Romania, the biggest port at the Black Sea (third largest in Europe) and also the fourth largest city in Romania with its 400,000 inhabitants. Constanta was founded by the Greeks as a port on the Black Sea Coast for trading with inland people and called Tomis (VIth c. BC). The city was renamed later after Constantina, niece of Constantine the Great (274-337). It was still a flourishing port city in the Xth and XIth centuries, trading with the Byzantine Empire and the city of Genoa.
You can get to Constanta by land, air, and water.
Plenty of buses connect Constanta with the rest of the country. Throughout the day Bucharest bound buses leave Constanta every 45 minutes from the Railway Station (called Autogara) . The trip takes about 3,5 hours thanks to the newly constructed A2 highway, also called "The Sun's Highway." Tickets costs RON 50-55, which is 10-15% less expensive than the train (see section below). Though buses are slightly slower than the train they are clean and comfortable and the newest ones have free WiFi which the train does not.
There are also several daily buses leaving from Constanta to Istanbul from the Railway Station (when you exit the train station turn left and walk 200m). The duration is less than 12 hours including time spent crossing borders and the prices for 2011 are RON 200 (EUR 48) a return ticket, including 1 night accommodation in Istanbul. 
Likewise, there are buses to Thessaloniki in Greece, Chisinau in Moldova and some buses to Varna in Bulgaria. One can also take a bus to Ostrov-Vama (€5), which is a village near the border with Bulgaria, cross the border and you are in Silistra, a town in Bulgaria. From there there are several connections to other Bulgarian cities such as Rousse, Dobrich, Sofia etc.
Frequent maxitaxis leave to resorts south of Constanta from the Railway Station (when you walk out of the train station turn right and continue about 200m).
Constanţa's train station has connections with the rest of the country. There are five daily trains to/from Bucharest during off-season and more trains in summer and the trip takes between 2.5-3 hours depending on the type of train. A second class ticket costs RON 61.60 as of September 2011. Most of the train connections from Constanţa are to Bucharest, which acts as the main railway hub for the region.
Starting from Constanţa train station seven daily trains serve destinations south of Constanţa, going as far as Mangalia. The earliest train heading to Mangalia departs at 06:30 and the last one at 19:03. The trip takes about 1hr20min.
For more information on trains and schedules check the website of Romanian Railways  Tel: 0040241666952.
Constanta has an international airport called Mihail Kogalniceanu Intl. Airport  which is about 20 km north-west of the city. Ryanair flies to Constanta from Pisa 3 times a week during the summer season. Starting with April 2011, there are also flights to Milano 2 times a week. Romanian low cost carrier Blue Air began its first flight to Brussels in July 2008 with a frequency of 1 flight per week. Turkish Airlines  flies Constanta from Istanbul three times a week. Romanian carrier Carpatair offers flights to many European destinations from Constanta through Timisoara.
The airport is connected to the city by a special bus which operates 2 times per day. The bus stops near the Central Station (Gara CFR). You can check the schedule here. 
Constanta is one of the largest commercial ports in the Black Sea and the third largest in Europe. There were ships connecting Constanta with Varna and Odessa managed by Navlomar  (€45 one-way, €60 return, summer only). This is probably not true anymore. There are said to be also routes to Istanbul, Turkey and Greece, but don't count on them.
You can use the public transport system (buses, and maxi-taxis). To get to Mamaia you can take the 301 mini van called maxi-taxi for 2 lei one way but it is very crowded during summer. The stop is in front of the main exit of the Railway Station, after the traffic light, on the side with the park. You can also take the special bus which takes you to Mamaia and has regular stops around the city and resort, it is a double decker buss and you can find it as you exit the train station in the bus station. (4 lei one-way ~ €1). You can also get to Mamaia by taking the 40 or 100 buses (3,5lei 2 trips ~ €0,8), but those two buses will leave you at the beginning of Mamaia and from there you must walk, take a taxi or a mini van. You should validate your ticket in the machines inside the bus unless you want to get a fine of 100 lei (~€25). The 48 bus line should be avoided at all cost since there are frequent incidents on it. A one day ticket for all buses costs 5 lei (~€1,1) and a one week ticket costs 24 lei (~€5). But pay attention that you can not use these tickets for the mini vans called maxi-taxi.
The best option is a taxi. A legal taxi must be painted yellow and must have the fee written with green or black characters on the driver's door. Always insist on starting the meter and try to avoid the cabs with red tariffs right next to the train station who, as in every major city, try to take advantage of tourists. Walk 100 meters from the station and only then wave to a cab. The typical fee from the train station to Mamaia is between 18 lei (€4) and 35 lei (€7-8) to the end of Mamaia (The typical fee is: 1,79lei/km during the day; 2,15lei/km during the night and 2,75lei/km outisde the city limits. The prices are available in August 2012). You can ask in advance the taxi driver how much does he think the ride will cost. If it is more than €10 do not accept. Taxis do not accept credit card payments.
In Constanta there are no paths for bike, but it is safe to ride the bike on the main road. There is a free rental service sponsored by Raiffeisen Bank, located in Tabacarie Park, which runs from June to October. You can rent the bike with your ID or passport for 2 hours with the option to extend for another 2 hours.
It is possible to cross the entire city in only a few hours, but beware that the sidewalks are in dangerously poor condition. At night in particular, the lighting is poor and there are many deep holes to fall into! Also beware of feral dogs, but most seem harmless.
Constanta has been continuously inhabited for 2600 years so there is a lot to see:
You can stroll the city's streets, the historical peninsular area which has a special charm, the sea coast, the Tomis marina or one of the many parks, on the lake-side or through the ruins of the ancient Greek colony Tomis.
You can do sunbathing or you can swim in the Black Sea. There is a large beach called Modern right in the middle of the city, which is favored by locals and is near the marina. Very very shallow waters (you can walk for 20-30 meters and the water won't pass your knees) so it's suited if you want to take your kids there and let them play safely in the water. The most significant beaches are in the Mamaia resort which is in the north part of Constanta. It consists of about 6-7 kilometers of sandy beaches with absolutely no rocks; the width of the beaches vary from 20 to 150 meters. It's also full of hotels, clubs and bars and extremely popular and fashionable in the summer. Moreover in the off season (September-April) they are a great place for taking pictures walks, or rides with the atv or enduro motorcycle and there are some centers for renting atv-s near the Cleopatra bar at the beginning of the resort. If you arrive by car not registered in the county of Constanta from May/June to September expect to pay an entrance fee of 3 Lei (1 dollar or 0,7 euros) at the entrance ticket booth for your car, although in 2006 the tax was off. The ratio of free parking/paid parking is around 25%/75% and the parking lots with the fee are guarded and not that expensive (3 Lei per hour) and a good alternative especially if you are on a motorcycle because people will climb your bike to take pictures on it. The paid parking places are marked with a white P on a blue background. The unpaid parking lots are on the sides of the main boulevard.
There are two main cinemas in Constanta. Cityplex (in Tomis Mall), Str. Ştefan cel Mare, Nr. 36-40, Tel. +40-241-483-183, http://www.cityplex-tomis.ro/; Cinemacity (in Maritimo Shopping Center), Maritimo Shopping Center, Aurel Vlaicu Bd. 900498, Tel. +40-341-445-401, firstname.lastname@example.org http://www.cinemacity.ro/program.php?cinemaId=1813 ;
Teatrul Naţional Constanţa, B-dul Ferdinand, Nr.11, Tel. +40-241-488-612 Teatrul de Opera si Balet Oleg Danovski, Str. Mircea cel Batran, Nr. 97, Tel. +40-241-480-300; Web -  Elpis, Str. Alexandru Karatzali, Nr. 16, Tel. +40-241-618-992
You can get aboard a tour boat from the Tomis marina which will take you on a trip to the open seas and back.
You can shop downtown, on the Ştefan cel Mare street where most big shopping centers are situated, including Tomis Mall , but also in the new, modern and bigger City Park Mall  - in Tabacarie Park. Another shopping center is TOM (Carrefour). A new shooping, Maritimo  opened recently.
You can also do your shopping at other shopping centers:
A typical meal at a restaurant is around €8-10 per person including drinks. Waiters usually know some English and menus are usually written in English. International cuisine is present, you should try the wines which are very good and not that expensive.
You will find a lot of fast food places selling kebab and shawarma (a nice mixture of grilled chicken, salads, French fries and sauces wrapped in a lipia (a sort of thin pancake used as a substitute for bread by Turks), very good and not that expensive (around 7 lei for a small one and 10 lei for a big one).
Bars and clubs
There are many bars in the city especially during summer-time.
Some hotels in Mamaia are open in the winter and you can get very good deals on accommodation in the off season.
Constanţa is a safe city even by European standards, but as a precaution avoid taking taxis near the train station and insist that they turn the meter on. If you visit the historical peninsular area at night, try to do this in a group. Unlike some other cities in Romania, people from Constanţa are well used to foreigners and are generally helpful. However,be very mindful of people engaging you in conversations on the street. Walking at night is okay even alone, though you should avoid walking with your camera around your neck and be mindful of pick pockets when using public transportation. Your religion is not of concern since a lot of locals come from very different ethnic and religious backgrounds, but refrain from commenting on religious matters. Unlike Western Europe or the Middle East, the local Muslim population is pretty secular and don't have a problem with western culture or habits.
Stay away from dodgy small casinos and avoid exchange offices especially those located in Mamaia. They have hidden commission (written with small letters) or separate exchange rates for travel checks and cash. Use only trusted exchange offices, like Balkan Exchange. If you are unsure go to a bank, Your best bet is to exchange money at banks, which are located throughout the city. Although banks don't have good exchange rates, they are still better than the rip-offs).
As with Bucharest and other big cities in Romania your biggest safety concern could come from feral dogs. If confronted by a group of barking dogs don't loose your cool and back away since they are usually territorial and won't chase you. If they get too close, pretend you are picking a rock from the ground. Whatever you do, don't run.
Women will not be permitted access in churches or mosques if they wear short skirts. Sleeveless shirts and short trousers are better to be avoided as well by both men and women.
to the south there are a string of summer resorts, Eforie Nord/sud, Costinesti, Neptun, Olimp. Neptun is recommended because it has a more relaxed atmosphere and for its lush forests that end near the sea. During the last NATO summit president Bush visited the resort for talks with President Basescu