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

A unique collection of gilded age mechanical pianos.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

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

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

A massive, abstract lookout tower providing a panoramic view of Prague.

This Czech military museum is home to pink tank that was once a symbol of art and political rebellion.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

An enormous and lavish Gothic church in Czechia.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

A church of bones, decorated with 40,000 human skeletons.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

A 16th-century horror show built in a lovely Italian garden.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This peaceful gem in upstate New York was chosen as the future home of the 14th Dalai Lama's Library and Museum.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

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

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Albert Einstein would often sit in this chair during visits to the observatory to discuss science with Willem de Sitter.

The house of physicists Paul Ehrenfest was also a temporary dwelling and study for his good friend Albert Einstein.

A Netherlands hotel where you can sleep inside a wine barrel.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

Oldest Museum of the Netherlands is a true cabinet of curiosities.