A wooden replica of France's famous tower.

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

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

This historic Australian bridge was built by convicts with giant stone spikes to prevent cattle from falling off the sides.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

Tombstones buried in overgrown grass mark the deceased occupants of this abandoned graveyard.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

Abandoned Soviet base once stocked with short and medium range missiles pointed at western Europe.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

This old Estonian mine has been kept like a sprawling time capsule of the local shale industry.

This 12,000 year old Iranian cave village has been continuously inhabited for over 3,000 years.

An intricate and amazing house built by architect Karl Junker.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This unique Renaissance castle was turned into a home for Nazi occultism.

This former steel and coal plant is now a neon-lit industrial fantasia.

No need to strap in for a “ride” on this walkable roller coaster.

An industrial relic is now one of Europe's most staggering art spaces.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

This monolithic slab of art metal crowns a German slag heap.

The Guardian of Tallinn.

Medical museum that houses most notably the taxidermied remains of Vladimir Demikhov's famous two-headed dog experiment.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.