A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

An essential stop before plundering, BYO Cutlass.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Surrounded by lonely toys, this Massachusetts gravestone marks the final resting place of six children who were murdered by poverty.

A secret Virgin Mary tucked away on a Brazilian beach.

One New Hampshire alleyway has become home to a public gallery of feline art.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

This grave in a ghost town cemetery marks the death of a witch on a day that never happened.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

A church dedicated to the Mexican skeleton saint.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

An abandoned beach resort in Normandy reclaimed by artists.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

A psychedelic labyrinth on the San Francisco bay.

This lesser known Hearst estate is a fairytale village built from the stolen bones of historic European buildings.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

This ancient burial site is believed to be one of the first earthquake-protected structures in the world.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

A winding, blood-red tunnel of hardened lava navigable by foot.