These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The curios of pharmacist and collector Henry Wellcome.

A self-built castle made by a mysterious man.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

This frequently-photographed waterfall takes only a short hike to visit.

Countless grotesque faces stare out from this eerie Prague art wall.

The hidden lair of an alchemist rediscovered in a 2002 flood.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

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

Northern Ireland's Brobdingnagian stepping stones.

A Jenga-style cylindrical tower of books that appears to go on forever.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

New York City's smallest piece of private property.

A strange house built only at night, with rumored mystic inspiration.