Cold war icon and onetime "hole" in the iron curtain.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

No one's quite sure where this quirky university tradition originated.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

A museum within a museum, devoted to history's most questionable medical devices.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Lebanon's highest point offers expansive views, martian terrains, and eerie ski lifts.

Modern museum, designed for Jihadi tourists.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

Sail in for a ’dam good slice.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

The history and future of cannabis.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The world's only museum devoted to the wonders of fluorescence.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

A font of vintage porn on the silver screen.

This mural painted by Keith Haring was done without payment as a gift to entertain the children at the Hôpital Necker.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

The narrowest street in Paris.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

Got apples?

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

This banal Parisian entranceway is not what it seems.