An unsettling sculpture of a boy hanging out in a street in Ghent has been baffling visitors for years.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

On a corner of the Ardmeanach peninsula on the Isle of Mull, a 50 million-year-old fossil tree hides in the coastal cliffs.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

Home to drunken tower-climbing goats... seriously.

Old car parts and assorted materials get turned into one man's mechanical treasures on the side streets of Cleveland.

This 17th-century structure is a beautiful testimony to traditional Persian architecture

Ethereal alien hums and haunting whale songs emitting from...a giant sheet of vibrating metal?

A collection of art from Bulgaria's time as a communist state.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

This ancient Irish landscape boasts hundreds of legendary ruins.

Follow the original medieval paths that wind through this intriguing section of the city.

A century-old tradition has culminated in a small but singular collection of feline effigies.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

These medieval tunnels provided water to the city above through centuries of civil war and plague.

Old Tudor home moved on thick iron rails to a new spot.

This tiny 1930s Art Deco airport is a beautiful remnant of a bygone era.

This large torch on the Hove coastline helped Sir Francis Drake defend England from the Spanish fleet.

A motley, fantastical agglomeration of unlikely houseboats along the Shoreham-by-Sea riverbank.

This public park was the site of the largest civilian disaster of the Civil War.

This secluded walking trail is a hidden gem of a Pittsburgh park.

These disused steel furnaces are now haunting ruins that may one day be a national park.