The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

In a small churchyard in Dingolfing, Germany the quaint Schusterkapelle is there to remind you of your imminent mortality.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

In 1830, cemetery workers in Cham unearthed a chamber housing thousands of skeletal remains from the 13th century, which can still be viewed today.

This German bone house contains the remains of some 20,000 souls.

An interactive museum dedicated to preserving and sharing the history of the home computer.

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

This museum is filled with an eclectic collection of unique inventions.

A Cold War command center is hidden under an idyllic countryside.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

A terrific purveyor of natural history objects and curios.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A collection of haunted objects and macabre oddities under one roof.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

This charming, hidden guild museum holds some 700 years of crossbow history.

Lavish royal estate punctuated with heated greenhouses.