Germany and Switzerland. Even though trains are still the most popular way of getting to Romania from Central Europe, due to good service, train services to the Balkans and former USSR are of a considerably poorer quality and are less frequent (mainly because railway infrastructure in these countries is a lot poorer than Romania's infrastructure). For this reason, a slew of private bus operators now provide quicker and arguably more comfortable coach services to and from cities such as Chişinău, Kiev, Odessa, Sofia and Istanbul.
A general rule of the thumb on whether you should use bus or train is this: if trains are available just as frequently, and at around the same price, and take around the same amount of time, then definitely use them. Otherwise, consider the buses.
For all information about buses in Romania and online reservations and tickets (i.e. timetables and prices) you can use www.Autogari.ro ("Autogari" is the romanian word for bus-stations). They accept also payment with credit card.
By boat
Cruises on Danube are available, very expensive though, starting from Passau or Vienna and having a final destination in Danube Delta. These cruises will stop in every major port along the road, in Austria, Hungary, Serbia and Romania. There you can travel by rapid boats, fisherman's boats on endless channels to watch huge colonies of pelicans, cranes or small migratory birds. You can enjoy a local dish, fishermen's borsch, prepared using different species of fish, but take care, they use the Danube's river water! It is the only way to travel around the Danube Delta, and the only way to get to the city of Sulina.
There are ferries across the Danube to/from Bulgaria in several ports: from Calafat to Vidin (runs about ten times per day, depending on the volume of traffic), from Bechet to Oryahovo (daily) and from Zimnicea to Svishtov (only on weekends).
There are reportedly (but not confirmed) ferry
