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

The walls and streets of the ancient city are peppered with penises.

One of Western Africa's oldest mosques, this Timbuktu icon has stood for nearly 700 years.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

George Martin's Caribbean recording studio now rots within the shadow of an active volcano.

The central mosque of this Mali town is entirely built from mud.

An ancient octagonal weather station named for the eight Greek gods of wind.

Hot springs monkey spa in the middle of Hell's Valley.

Strange, gentle beasts resembling goat-cow hybrids roam within this patch of forest.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

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

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

The shortest in the world, this landing strip stretches a mere 1,312 feet before steep cliffs on either end plunge into the Caribbean.

This tiny 1930s Art Deco airport is a beautiful remnant of a bygone era.

Ancient Manuscripts showcase the civilization of West Africans during the Middle Ages.

These homes carved into the mountains seem to defy the laws of nature.

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

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.