Artist Jack Pierson made this surreal sculpture in honor of Wonder Valley, a countercultural community on edge of civilization.

This outdoor observatory offers stellar views and a scale model of our solar system.

An eerie natural formation that looks right back at you.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

The only rotating bar in New Orleans has been slowly spinning since 1949.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

A snapshot of the city's fascinating voodoo culture.

A museum to a cave explorer whose tragic death was a media sensation, and whose corpse became a tourist attraction.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

Mysterious library of an infamous financier and spiritual seeker.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

Where Agatha Christie mysteriously disappeared in 1926.

Every year locals tumble 650 feet down to the bottom of the hill chasing a Double Gloucester cheese.

Constructed from recycled wrought iron railroad tracks, it's been described as the most beautiful seaside pier in England.

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

This Grade II Listed Building with an Art Nouveau façade once contained a unique print shop.

An architectural oddity hides in plain sight on this iconic London bridge.

Hear the quietest sound from across the dome.

The medieval woodcut-style artwork chronicles life in medieval London.