Tower that was a frequent stop on the travels of King James I.

The legendary bathing site of a Moorish queen is actually part of a Roman fish farm.

This magnificent brick dome was made with an unusual design method.

Stop by, and you'll receive a map to two well-preserved ancient petroglyph sites.

A series of well-preserved ruins show the culture of the ancient Benehoaritas people.

These ungulates have quite literally bounced back from the brink of extinction.

The fragmented remains of a massive public bath connected to the city's water supply.

Disturbing winged beings decorate the walls of this strange abandoned hermitage.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

Possibly the oldest masonry dam in all of Europe.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

The cathedral of a controversial, conservative, schismatic sect that declared the Catholic Church heretical and founded its own succession of popes.

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

The surviving remnants of a destroyed medieval church now stand in a public park.

These three pillboxes still remain as a witness of the Spanish Civil War in a park of Madrid.

According to tradition, King Phillip II supervised construction of the seat of his empire from this seat carved into rock.

See replicas of Europe's most famous cave paintings and even some of the animals that feature in the art.

A spectacular walk on the flank of a gorge.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

One of Europe's largest groups of dolmens remains largely off the typical tourist track.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

Two 2,500-year-old Phoenician boats found on the coast of Spain, giving incredible insight into the ancient maritime traders.

Locals use these rock pools and waterfalls for swimming and cliff diving.