Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

The private train station King Leopold II built for the Belgian royal family now lies abandoned.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

The longest staircase lock in Britain.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

The world's largest reflecting pool is just two centimeters deep.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

One of the oldest bank museums in Europe showcases unusual currencies of the world and other money-related miscellanea.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.