This Art Nouveau gate still stands at the former entrance of a 20th-century Spanish writer's colony.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

One room inside this building mesmerizes all with its parabolic dome.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

A tiny island is connected to the mainland by a private railway that residents travel in their own personal wagons.

Digger attempting to hide itself under 300 tons of rubble.

A unique, modernist church tower that appears to float above the ground.

A beautiful photography exhibition space housed in a former church.

This Danish art forest places loud works of contemporary art among the pensive silence of nature.

Four alabaster giants contemplate the tides on the shore of Denmark.

A natural wonder in south Denmark.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

What was once a bustling mining installation is now a bustling hub of contemporary art.

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

Two gravestones clasp hands over the religious divide.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

No need to strap in for a "ride" on this walkable roller coaster.