The World's Most Lavish Deserted Structures

11. Estonia's Rummu Prison

Location: Estonia's Rummu, Vasalemma Parish 1938 is the year Price: $3.10 to enter Rummu is an underwater prison in Estonia. Rummu is very distinctive compared to other underwater prisons. Originally, Rummu was a limestone quarry. The quarry was converted into a prison camp in 1938 by the Soviet Union, who ruled Estonia until the 1990s. As part of their sentence, prisoners were forced to mine limestone.

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Estonia's Rummu Prison © Shutterstock/Janek Sergejev When the USSR fell apart in 1991, the jail was abandoned, and the quarry quickly sank due to a lack of oversight. Presently entirely submerged, Rummu Prison is a well-liked destination for scuba divers who like to investigate the buildings and mining machinery of the former prison beneath the surface.