An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

A monument celebrating the idea of reaching inaccessible places.

When you can't get to the Pacific, just go to Florida.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

2300-year-old Roman road connecting the empire.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The statue's head is one of the few fragments of the original Urakami Cathedral to survive the atomic bomb.

This traditional Japanese-style house doubles as one of James Turrell's colorful works of art.

Fine dining in the bizarre world of Lewis Carroll.

Bring your hiking shoes, wool socks, and thermal underwear for a stay in these cozy forest huts.

The ruined remains of a coal mining ghost town are hidden within the woods.

This park contains a number of standing stones meant to heal and inspire.

This might just be the TARDIS of bookstores.

A beautiful oddities shop crammed with strange and morbid curiosities.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A toxic ghost town sitting atop a massive coal fire.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.