A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Get in line for Lisbon’s most famous sandwich.

Sip cherry liqueur at a bar dating back to 1840.

Eat the ultimate iteration of Portugal's most beloved pastry.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

This sculpture in Valencia features 22,000 tiny, obsidian blue figures that pay homage to the Lady of Elche.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

It turns out what appears to be an Ancient Roman aqueduct isn't so ancient after all.

Mosaics, storks, and brothels—this ancient city has it all.

A caravanserai turned into a museum showcasing the mastery of local carpenters.

The oldest known university in the world is in Fez, Morocco.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Traditional 11th-century outdoor tannery.

The other side is actually green.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

Decorated with a staggering 1,380 ladybugs, the installation has turned what was once a grim, forgotten nickel mine into a landmark and a statement.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

A memorial to the atrocities of the People's Socialist Republic of Albania.