An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Banksy's image of a naked man dangling from the window of a sex health clinic.

A section of a historic wooden trestle viaduct is preserved next to the railway line it once carried.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

A Neolithic burial tomb connected with a colorful array of legends.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

One of the few surviving street funiculars in the world.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

Three bridges straddle a stream, one stacked upon the other.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

London's smallest police station is barely the size of a phone booth.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.