An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

This hidden courtyard in the Andorran capital hosts a unique contemporary sculpture park.

A monster in the plant world, up to 10 feet tall and smelling of death.

The soaring gondola lines form the longest aerial cable car system in the world.

Bolivia's needle-like rock formations.

A valley of unique erosion patterns lends to a view like nothing on Earth.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

This Cambodian riverbed is covered in ancient Hindu carvings both above and below the waters.

A battle between nature and architecture in the Cambodian jungle.

More than 100 Hindu temples are slowly being swallowed by the forest.

Arguing within this idyllic, circular volcanic lake is forbidden.

The centuries old trees lining both sides of this dirt road may become Madagascar's first natural monument.

The runoff from these fiery cliffs sends red water flowing into the sea.

This roadside monument commemorates the huge weapon built by an Ethiopian emperor's hostages.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

Founded in 670, this ancient mosque is an architectural time portal.

This grand hydraulic installation has provided water for townspeople since the Middle Ages.

The best-preserved Roman small town in North Africa.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.