This wooden recreation of a 9th century lake village looks as though it was built yesterday (which it relatively was).

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

A huge Soviet-era robotics factory in the outskirts of Pripyat, now long-abandoned.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This attraction was abandoned after the Chernobyl disaster.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.

Remains of the old fortification along the Western border of the USSR, now an elaborate defense museum.

A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

A symbolic graveyard for the villages that perished during the Nazi invasion of Belarus.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Ancient paintings known as the "Sistine Chapel of Cave Art."

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

A treasure trove of fine art is hiding inside this small medieval abbey in Gascony.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

This Arab fortress was once the largest citadel in Western Europe.

This haunting location was featured in the final scene of a classic spaghetti western.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

The gaunt visage of this angular Christ giant is enough to put the fear of God into all who see it.

This former power station is now a museum dedicated to the region's coal-producing history.

This house covered in small stones was the work of one man over the course of nearly 30 years.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

This Gallo-Roman sanctuary is dedicated to Serápis, god of the underworld.