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

On the eve of a condemned prisoner's death, this bell rang 12 times outside their cell.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

These planks were originally installed to hold the dead.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

A series of five defunct panopticon prisons in Cuba.

A haunting theme park is slowly being swallowed by the jungle.

Like something out of a pulp adventure, this abandoned plane wreck is slowly being retaken by the Caribbean jungle.

A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

A surprisingly beautiful abandoned World War II military base in East Greenland.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

Fantastically decorated underground chambers built in the 1760s.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

This crumbling folly looks like an enchanted left over from Middle Earth.

The location of the last witch trials of Italy, known as "The Salem of Europe."

The home of Ireland's last leprechauns is officially protected by the European Union.

These abandoned grain silos and tunnels are an urban exploration dream.

A bizarre house filled with an astounding array of collections.

You haven’t properly toured a winery until you’ve slept in an actual wine barrel.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

Where the sleeping monsters of Scotland's oil industry are left to rust.