Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

The first museum in the world devoted to sexual gadgetry.

Walk through Czech history in Prague's largest graveyard.

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.

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A church of bones, decorated with 40,000 human skeletons.

The final resting place for Bermuda's British military, including a man who died of sunstroke.

The abandoned Bermudian home of a British naval leader is surrounded by crumbling sporting fields and the graves of convicts.

Home of the first female Hungarian poet, where her secret writing lay hidden for over a century.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

Climbing to the top of the cathedral's bell tower offers sweeping views of these medieval ruins.

A memorial museum to the political prisoners who were held at Sighet Prison, once one of the most feared places in Romania.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

Gigantic Romanian salt mines used to heal respiratory conditions.

A stunning 18th century pharmacy and medieval chemist's collection.

This bone-filled cave got its name after they found 140 bear skeletons inside.