This building holds the embalmed remains of the leader of the Bolshevik Revolution.

The only tower of an aerial tramway standing over a ski-lift.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Mountain where Jesus was first tempted by the Devil.

This bell tower is the only one of its kind in the Netherlands and was a symbol of prestige.

The location of the world's first telescope demonstration.

Once housed in the towers of this Gothic church, this 17th century clock still ticks today.

An unassuming rod in the Netherlands was once the old standard unit of length for the entire Dutch empire.

The 20-mile causeway that separates the Netherlands from the sea.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

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

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This cemetery features modernist statues as strange as its name.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

These temples are among the oldest free-standing stone buildings in the world.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

The floor of this spectacular Baroque sanctuary is covered in memento mori.