Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

In an isolated field near a dilapidated barn stands this chilling portrayal of the plight of the Nuba peoples of Sudan.

This fantastic museum honors Gloucester waterway heritage.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

A site of pagan worship which still attracts people looking for fairies.

A pagan tradition of draping trees with rags eerily lives on.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

The trials and tribulations of marking Poe's grave.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Countless grotesque faces stare out from this eerie Prague art wall.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A Jenga-style cylindrical tower of books that appears to go on forever.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A hotel and restaurant serving as the mecca of kitsch.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.