This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

These old World War II fortifications have been transformed into an unusual equine attraction.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

The original resting place of Queen Cleopatra and Mark Antony's only daughter.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

Spend the night in this formerly abandoned traditional Scottish village.

The Neolithic megalith was one of the first archaeological ruins protected by the British government.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

Tucked along a river are enigmatic stone carvings created thousands of years ago.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

One of Western Africa's oldest mosques, this Timbuktu icon has stood for nearly 700 years.

These underground shelters dug by the Japanese during World War II later helped East Timor achieve its independence.