20. Abandoned Submarine Base in Balaklava, Ukraine
While this old submarine dock in Ukraine isn’t totally abandoned, the decommissioned formerly top-secret site near Balaklava is still impressive. Until its decommissioning in 1993, the site was one of the Soviet Union’s most top-secret sites, and was said to be able to weather a direct nuclear strike due to its underground construction. Today, it is a national naval museum.
21. Kolmanskop, Namibia
Kolmanskop was a small settlement in Namibia that saw a boom in the early 1900s when German settlers realized that the area was rich in diamonds. The surge of wealth gave out after WWI, however, when the diamond field began to deplete. By the 1950s, the town was completely deserted, and is now visited by photographers and tourists.