This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

This large midwestern cavern features impressive rock formations and an underground waterfall.

Pilgrimage site for star-crossed lovers.

No one knows the origin of this small town’s unique name.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

The "world's smallest volcano" has been used to store meals and dispose of dead bodies.

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

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

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

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

Lured here by the promise of tens of thousands in gold, Jesse James started a quintessentially American trend of robbing trains in-motion.

This little-known, 35,000-specimen collection in Greece is a lepidopterist's dream.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

This extensive collection of dead bugs may be the world's most idiosyncratic and personal insect museum.

This historic train station has been converted to a locomotive themed hotel.

During this Bolivian festival/fair you can wish for wealth, success, love, and more by buying a miniature version of your desire.

Discovered after draining a local pond, these ancient man-made caves are still a complete mystery.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The largest whale museum in Europe allows visitors to walk among life-size giants.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.