A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

This small museum collects the Christian remembrances which would otherwise be forgotten.

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

The location of the last witch trials of Italy, known as "The Salem of Europe."

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

The final resting place to 300 Victorian-era pets hides inside the city park.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

Theme park featuring miniature replicas of European monuments.

Museum preserving torture methods from the past.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A sweet museum focused on beets.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

Puppet theater and museum holding a collection of more than 300.

Berlin's old airport.

When German-Iraqi relations broke down, this embassy was vacated post haste.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The most visited, and possibly most controversial, museum in Germany.

A collection of abandoned typographic signs from Berlin and beyond.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

A famous burial ground with a history both grim and literary.