One of the largest ochre quarries in the world, hidden in a limestone landscape.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

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

This semi-secret storybook hedge maze is also the oldest garden in the city.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

One of Europe's largest supercomputers is housed inside of a disused chapel.

This cemetery features modernist statues as strange as its name.

A bookstore dedicated to the intersection of comedy and art.

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

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

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

Defy gravity at this fascinating Pyrenees overlook platform.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

From the dishes to the art, this Michelin-starred restaurant orbits around one beloved French melon.

Thousands of flamingos and other bird species flourish in these Camargue wetlands.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

This historic stone gate tower is now just a lonely relic in the middle of a swamp.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A museum dedicated to linguistics, from how babies learn to talk to endangered and extinct languages.

The history of radiation is on safe display at the foot of a radiation science laboratory.

An iconic location along the Los Angeles River where countless movie scenes are filmed.

Along a California highway is a kind of Jurassic Park made of metal.