The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Depending on how it is measured, this lighthouse can claim to be the tallest in Europe and the tallest conventional lighthouse in the world.

This peculiar Italian elevator runs both horizontally and vertically.

Although called a funicular by both its owner and the locals this historic railroad is actually a rack and pinion system.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

Massive galleon from a box-office bomb docked in Genoa.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

An ode to the washerwomen who called Pavia home.

The last of Amsterdam's original sea level markers remaining in place.

Europe's official "zero-level," the equator of elevation.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

The oldest statue in the Netherlands has survived relocation, bombardment, and burial.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This historic black and white monastery is one of Bulgaria's architectural jewels.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

A concrete mushroom that divided Stockholm residents for nearly a century.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

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