According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

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

The oldest Roman lighthouse still in use.

Wonderland replication in progress by one persistent man.

Medieval village and microminiature museum.

A darkly erotic open-air statuary in Catalonia.

Village situated on a narrow volcanic escarpment.

Seaside ruins of a settlement that date back to the first century B.C.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

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

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A Spanish town built into the cliffs.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

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

Rare karst landscape eroded from a flat seabed.

This ancient Spanish castle sits high upon a hilltop.

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

A beautiful but toxic fountain of mercury.

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

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.