This partially reconstructed Aztec pyramid gives a glimpse of what its larger counterparts would have looked like.

This garden houses the remains of the ancient Greek port of Marseille.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

A series of caves, tunnels, and wells filled with fascinating figures and symbols.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

WWII artifacts, including the building itself.

These magnificently sculpted tombs represent Spain's own legendary version of "Romeo and Juliet."

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

In the Netherlands, one of the world's largest private car collections can be found.

Despite its grandiose name, this enigmatic first-century void under the town is no cave, and it's possibly not a palace either.

This French chateau is home to the world’s largest private collection of fighter jets.

The birthplace of most all of Europe's space missions is here on the Dutch coast.

One of the world’s largest cave systems houses legends, concerts, and wondrous rock formations alike.

This modern New Zealand attraction honors ancient forms of astronomy and scientific understanding.

The shockingly unspoiled Peruvian tomb of the Lord of Sipan was once guarded by a footless warrior.

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

This Arab fortress was once the largest citadel in Western Europe.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.