The facade of this 16th-century building is decorated with carvings of 300 seashells.

Fragments of human bones are embedded in the walls of this quaint alley.

The tallest tower in Cáceres's Old Town.

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

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.

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Spain's largest bullring offers a unique glimpse at architecture and history.

The final resting place of the great navigator, or maybe his brother.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

A 16th-century Andalusian palace.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

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.

God's Saharan sandbox of wrath.

Traditional 11th-century outdoor tannery.

The other side is actually green.