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

Rare karst landscape eroded from a flat seabed.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

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

Monkeys inhabit the lush forest surrounding ancient Mayan ruins once considered sacred.

These roaring primates were considered a divine creature in the cosmology of the Maya.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

Neo-cave art on the macro scale.

The stoutest tree in the world.

This beautifully deceptive waterfall is something far different from what it appears to be.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

66,000 pieces of art, donated by one of the world's richest men.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

These temples are among the oldest free-standing stone buildings in the world.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

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.

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

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