Swallow's Nest Castle, Republic of Ukraine

This diminutive castle is located on the Black Sea near Yalta on the Crimean peninsula of southern Ukraine. Built in 1911, the castle was closed in 1927 after an earthquake damaged the cliff, and remained closed until 1968 when the cliff was reinforced. Today it is a popular destination in the Republic of Ukraine, but it holds very little historic value. In fact, nothing happened here.

http://en.wikipedia.org/wiki/Swallow%27s_Nest_%28Crimea%29