This historic, palatial theater is now one of the world’s most beautiful bookstores.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

This spa theme park lets its guests take a dip in pools of coffee, wine, or ramen broth.

A small town Romanian cemetery filled with darkly humorous gravestones.

An eccentric inventor's castle home with its own indoor weather system.

A museum within a museum, devoted to history's most questionable medical devices.

A clear blue swimming hole with hidden caves, still unexplored.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

A hip bar decorated with walls of golden skulls.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

The Magical World of George Phar Legler.

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

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

A self-built castle made by a mysterious man.

The largest self-built castle in the U.S., six decades in the making.

One man's extraordinary topiary garden in a small South Carolina town.

A popular swimming hole that hides one of America's most deadly diving spots.

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

New York's oldest magic store.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One man's homage to the sun continues to grow like a glass fractal.