It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Shop of curiosities with a dinosaur museum tucked in its basement.

A dilapidated dock tells the story of Titanic's missed arrival.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A haunting collection of the vanished and disappearing natural world.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

In paradise, feral pigs have claimed an island all to themselves.

Peek through a transparent pyramid and drink in the mountain made of books.

The world's longest known cave system.

Cat art as far as the eye can see.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

One of the largest, oldest, darkest, quietest motel rooms in the world.

A house filled to the brim with oddities and curiosities.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Surreal riveted sea forts once protected the Kent shores from German attack.

A curious collection dedicated to human and animal anatomy and pathology.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.