There are 11 trains daily from Timisoara and eight from Bucharest, train timetable http://www.cfrcalatori.ro; and http://www.infofer.ro. Nearby (11km north of city) is a border crossing with Serbia, at Porţile de Fier I (Iron gate I). However the border crossing is vehicle only, no pedestrian access. From Serbia, there are reportedly daily buses from Kladovo opposite the Danube. From within Romania, there are multiple daily buses from Orsova and Craiova. Main bus station (Autogari Drobeta-Turnu Severin) is at corner of Bulevardu Nicolae Iorga and Strada Topolnitei, GPS coord. 44.631376, 22.673107.
The historic remains of the bridge over the Danube built by Appollodor, in about 100 AD, can be found in the historic park of the local museum.
The Water Castle, Str Crisan. GPS coord: 44.629882, 22.652053, . The Water Castle was opened in 1914 being part of the water supply network, and has since been a landmark for the city. It has recently re-opened for the public. The tower hosts several art and culture exhibitions and events. Take the stairs or lift to the top for a panoramic view of the city and its surroundings. edit
Trajan's Bridge, Str Independentei nr 2, . Drobeta holds the remains of Trajan's Bridge constructed in 105 AD, the longest bridge in the world at the time, as well as the Roman caster remains. The museum is currently under refurbishment (May 2013), check with the local tourist information desk for an up-to-date reopening schedule.edit
Iron Gates Hydroelectric Plant Museum, Calea Timisoarei nr. 4, Gura Vaii, Mehedinti. GPS coord. 44.675065, 22.533921, ☎ +440252 311 627. Located right by the Porțile de Fier I border crossing, as part of Iron Gates Hydroelectric Power Plant, which generates 15-20% of Romania's electricity. In the museum there are some poor quality photos and diagrams showing the construction of the power plant with no accompanying explanatory text; and a few cabinets displaying the region's history with very limited artefacts from the Paleolithic and until the Middle Ages. Hours: 0900-1600 daily, closed Monday. To reach there using public transport, take buses which go to Gura Văii or Orșova and ask driver to be dropped off at the border crossing (Gura Vaii). If using taxi, distance is 12km from Drobeta-Turnu Severin city center. Ticket 4 Lei. NOTE: only the turbine room is available for visitors to view, whom must be accompanied by a 'tour guide', the 'tours' start every hour and encompass literally 5 minutes behind glass windows looking at the upper portion of 6 generators. Overall experience is extremely underwhelming, as there are far better hydroelectric power plants to tour elsewhere. Reconsider your need to visit.edit
Hotel Continental overlooking the Danube offers reasonable, clean accommodation with some rooms having view over Danube. Upper floors weak Wifi, some rooms have many mosquito. Lots of fish on the menu. Friendly and helpful staff. Single room 29 Euro with breakfast, 25 euro without (June 2014)
Hotel Traian: a cheaper alternative, with 2 and 3 star rooms, somewhat dilapidated. Wifi can be patchy and unstable. Cheapest room at 80 Lei.