Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A surreal statue honoring Prague's favorite literary son.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

A unique work of automotive art calls this shopping center home.

Cat art as far as the eye can see.

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

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

The attic of a four-century-old canal house hides a clandestine church.

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

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

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

Christ's blood allegedly preserved in a Belgian town.

This huge limestone slab is considered the largest paving stone in Belgium and a relic of the earliest modern paving in Brussels.

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

A bronze statue of the fictional character nicknamed "Mrs. Hat" from a beloved Belgian comedy.

In the middle of a Brussels roundabout, a cargo container balancing on its edge.

Cozy basement bar sports an inventory of over 2,000 beers.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

An important landmark in the history of algebraic logic.