This ancient theater was once the home of fierce gladiatorial battles.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Beneath the city of Lourdes, France is a massive, concrete church.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

Historic medieval fortified city in southwest France.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Ancient paintings known as the "Sistine Chapel of Cave Art."

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Mountain where Jesus was first tempted by the Devil.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

This elaborate temple was built around one of the Buddha's teeth.

Huge herds of Asian elephants can be seen walking, bathing, and just chilling at this Sri Lankan park.

An ancient stone fortress considered by many to be the eighth wonder of the world.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.