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

100 massive sculptures in the Hudson River Valley.

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

"A hideous albatross in the Hudson River Valley."

Home of Philip Johnson, one of the 20th century's most influential architects.

The intriguing personal collection of a professional demon-chaser.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

A wunderkammer hidden on the top floor of the Hartford statehouse.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

137 graves holding New England's earliest residents.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

An enormous concrete structure built over a nuclear crater.

The most decorated dog of World War I is preserved in the Smithsonian.

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

A two thousand year old brothel uncovered in Northern Greece.

One of the world's southernmost bars.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

An Australian lake whose pink hue defies scientific explanation.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Pennsylvania's own Roswell-style UFO mystery.

Annual convention held by the largest pyrotechnic community in the world.

A unrivaled and rather horrifying collection of wax dermatological models.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.