Kennecott, Alaska

Wrangell-St. John’s Kennecott (located in Wrangell-St.. Located in Elias National Park, it was a self-contained mining town with its own hospital, skating rink, tennis court, and dairy.. Despite being abandoned for several decades, many of the buildings are still quite beautiful despite deteriorating beyond repair.. Many of Kennecott’s buildings and lands were acquired by the National Park Service in 1998; the visitor center is open from Memorial Day to Labor Day, and the recreation hall may be rented for special events.

Rummu Prison, Estonia

Estonia’s semi-emerged Rummu Prison might just be the creepiest underwater site in the world. Prisoners were forced to work in nearby limestone quarries during the 1940s, when the Soviet Union built the prison.. In 1991, Estonia gained independence, but abandoned its jail, resulting in an unsupervised quarry that quickly filled with water. Today, Rummu Prison is one of the most popular beaches for scuba divers eager to explore submerged buildings and mining equipment