This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A tree grown from astronaut seeds which were exposed to cosmic rays.

Secret Soviet city once home to Russian cosmonauts and space training facilities.

The final resting place of a space program monolith.

Historical Japanese-Dutch relations are honored with haunted rides and flower fields in this replica town.

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

When German-Iraqi relations broke down, this embassy was vacated post haste.

A nuclear power plant abandoned along with an international allegience.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

The encased skull that is widely believed to belong to St. John the Baptist.

This little-known relic crypt holds stolen parts of a Roman Empress.

137 graves holding New England's earliest residents.

A cemetery and the town it served sinks beneath the sea during the volcanic birth of Mt. Vulcan.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

Record-holding coffin moonlights as an eatery run by undertakers.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

The wreckage of a tragic plane crash is on display at this museum devoted to a famous Italian conspiracy.

One of the most horrible legacies of the Cold War is a site where the Soviet Union tested nuclear bombs on civilians.

Rare signs of the former Soviet Union in the Caribbean, though not where you'd expect them.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.

An enormous concrete structure built over a nuclear crater.