This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Rebuilt remains of a temple to Roman god Mithras.

An underground city of salt.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

This grubby wall is said to be one of the Earth's esoteric energy centers.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This man-made mound monument was built out of soil from all across the Polish empire.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

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

The haunting complex honors the millions of Ukrainians who died in the forced famine under Soviet rule.

340-foot statue built to honour the Heroes of the Soviet Union.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

Protecting the dead from opportunistic body snatchers.

Be on the lookout for the symbolic insect all over the city.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.