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

A little sculpture with a large wardrobe.

Brussels' favorite peeing boy has a sister.

Also known as Napoleon's Canal, this waterway was created on the orders of the general, and construction was interrupted by Waterloo.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Europe's first floating restaurant is home to a hilarious legend.

The grave of the famous painter is marked by a simple stone in the ground.

The broken skateboards that became a poignant memorial to a murdered skater.

A measuring mishap led to these artificial stone ladies losing their stomachs.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

Millions of numbers carved in glass represent the tattoos forced upon victims.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

In 1986, Keith Haring was arrested for painting this anti-drug mural on a Harlem handball court.

The real-life site of Ichabod Crane's infamous gourd attack.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient Egyptian temple in the middle of Madrid, Spain.

These distorting, funhouse mirrors achieved fame in a renowned piece of Spanish theater.

Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

This sculpture pays homage to the street sweepers of Madrid since its inauguration in 2001 in Plaza Jacinto Benavente.