The world's largest squirrel statue clutches a pecan bigger than your head.

A Texas landowner spelled out his name with three miles of trees, a giant signature that's been used by NASA to evaluate satellite imagery.

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

The apartment building where JFK's assassin lived after defecting to the Soviet Union.

Glowing orb in Minsk houses 8,600,000 items.

The deepest metro station in the world.

An Art Nouveau building covered in animal gargoyles and grotesques.

This derelict superstructure was a very important warning system for the Soviet military.

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

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Padlocks cover this rickety footbridge with love.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

A boulder carved into the shape of the cosmonaut's head.

Iconic pyramid from famed British architect Norman Foster designed to represent all of the world's religious faiths.

The Guardian of Tallinn.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Church built on the site where the last tsar of Russia and his family were killed.

Stalin's secret bunker.