This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

The history and future of cannabis.

People from around the world visit the shrine of Japan’s legendarily loyal dog.

This spooky statue sits outside a famous Prague theater.

A series of playful yellow penguins share a serious message about the environment.

A saintly relic hidden in a Prague church basement.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

An Orwellian sculpture with eyeball cameras watches passersby.

A mocking tribute to the past and modern leadership of Prague.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This doorless 20th-century elevator doesn't stop or slow down.

This artificial cave looks like something out of a fairytale.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

Countless grotesque faces stare out from this eerie Prague art wall.

A Jenga-style cylindrical tower of books that appears to go on forever.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A museum dedicated to the former country.

This ice cream parlor serves scoops of flavors like rakia, medlar, and poppy seed.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

A collection of intricate sculptures so small they have to be seen through a microscope.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.