The natural history museum displaying the British bird collections and dioramas of Edward Booth, free of charge.

Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A movable feast that is an East London institution.

A surreal museum of extraordinary industrial objects.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

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

This classic restaurant features a gorgeous mirror-clad room.

3,000 market stands in five former Zeppelin hangars.

Floating swimming pool within a moored vessel.

Antique frame collection with 2,400 frames.

A curious collection dedicated to human and animal anatomy and pathology.

A place of remembrance for the Prime Minister that met a violent end.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A museum which takes visitors to the côté obscure of Paris.

The personal library of the founder of modern neurology is open to visitors.

A sweet museum focused on beets.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

A house of bones — but nobody is quite sure to whom they belong.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

One of the world's largest collections of pathological specimens.