A semi-scholarly approach to sex.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

A massive playground in the woods of Germany.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

This incredible Chinese theme park may be the largest bootleg in history.

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

Step into a pastel time capsule where candy is truly dandy.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

World's first "penitentiary," meant to be humane, drove men insane.

A rare view of a preserved Victorian science museum.

This public space is speckled with the eerie remnants of a defunct amusement park.

A quaint amusement park now sits, rusting and forgotten among the foliage.

An abandoned amusement park turned street art gallery with open walls for visitors to spray paint.

Fantastic collection celebrating the final send-off.

These unique rock formations were created during the Ice Age.

Reclaimed material from a convent destroyed by cannonfire was used to build parts of this 19th-century cemetery.

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

This labyrinthine resting place of Black American leaders has been reclaimed by nature.

This recreation of a 19th-century dime museum is full of oddities.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

This circus town museum recognizes the outstanding clowns of history.

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