By train
The city is reached by several local trains from Ciulniţa junction on the nearby Bucharest-Constanţa mainline a 30 minutes trip. There is also one direct train from Bucharest 3 1/2 hours travel time and one from Constanta over 3 1/2 hours away. Timetables can be found on the railway operator's CFR website (http://www.cfr.ro/calatori/).
By bus
There are buses every 30-60 minutes from Bucharest 2 1/2 hours travel time and multiple buses from Constanţa also 2 1/2 hours away. Most of their schedules are available on autogari.ro (http://www.autogari.ro/in...)
By ship
There are ferrys across the Danube to/from the village Ostrov every 15 minutes during the day and every 30 minutes at night; the docking area at Ostrov is on the outskirts of the Bulgarian city Silistra, right next to the border crossing point a separate, direct ferry to Silistra used to exist, but it's no longer running.