Bulgaria (Russian: Булга́рия, tr. Bulgariya) was a Russian river cruise ship which operated in the Volga-Don basin.
On 10 July 2011, Bulgaria sank in the Kuybyshev Reservoir of the Volga River near Syukeyevo, Kamsko-Ustyinsky District, Tatarstan, Russia, with 201 passengers and crew aboard when sailing from the town of Bolgar to the regional capital, Kazan. The catastrophe led to 122 confirmed deaths (bodies recovered and identified)
On 10 July 2011, Bulgaria was traveling in Tatarstan on the Volga River when she was caught in a storm and sank at about 13:58 Moscow time (09:58 UTC), several hours after beginning her cruise.
Survivors say that during the cruise, Bulgaria encountered stormy weather, and listed sharply to starboard. This was apparently compounded by the captain trying to turn the boat around, and soon water rushed into the vessel through portholes that had been opened because the ship had no air conditioning. According to a survivor, the sinking came without warning, and the vessel "listed to starboard ... and capsized and sank."
The boat sank within minutes, plunging nearly 20 metres (66 ft) to the river bed. The sinking occurred about 3 kilometres (1.9 mi) from shore, in the Kamsko-Ustyinsky District