Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Site of one of World War I's most horrific scenes.

A swath of France so devastated by war it is still forbidden to go there.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

A beautiful example of 18th-century engineering still standing tall.

The building that houses this museum is as historic as its collection.

After becoming locally extinct, this esteemed avian now flies free in the forests around the ancient ruins.

The conquistador's former fortress is the oldest preserved colonial building in the Americas.

The enigmatic skull gazes out over the ruins of a once-great Mayan city.

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

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

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

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

Extraordinary sculpture garden created by an eccentric English poet.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Pre-Incan aqueduct amidst a stone forest in Peru.