The tallest tower in Cáceres's Old Town.

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

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

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

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

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

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.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This lucky bronze frog was gifted to Madrid by a casino.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

This small group of sand dunes manages to pack in a strange rainbow of colors.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A colossal statue with a controversial past, forgotten for more than 30 years.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.