A plaque is all that remains of a lost Oxford transport hub.

The old church, buried by the 1784 Mount Vesuvius eruption, is a remarkably well-preserved place where people now pray for the souls of the dead.

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

This hill is known for its connection to the occult in Slavic tradition.

A historic Black graveyard hidden in the parking lot of one of America's largest malls.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

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

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

This tangled English forest looks like something right out of a fairytale.

This nondescript building hides an entrance to an underground nuclear tunnel system.

This dreamy street will transport you to wintertime in Victorian England.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

This Manchester laundromat is hiding something.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

A hidden plaque is the only reminder of the lost palace where two storied English kings were born.

Artists have long been drawn to these atmospheric 12th-century ruins.

This Victorian graveyard in Leeds is a macabre collection of beautiful tombs and memorials.

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

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

Iceland's first pagan temple in 1,000 years is underway in Reykjavík.

A lonely beacon, precariously perched atop a remote sliver of rock.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

This museum dedicated to divination also honors a local 10th-century prophetess.