The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

Stalactites and stalagmites in a beautifully lit cave.

A sixth-century Byzantine cistern hidden below a modern carpet store.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

Enormous statue of the Emperor of the Mongols.

In La Paz's huge, city-sized cemetery, the deceased are stored in rows of apartment-like buildings.

A Christian monastery stands on what was once a holy Incan temple.

Thousands of volcanic rocks carved 1,000 years ago.

The forgotten tomb of the Peruvian rubber baron who was the inspiration for Werner Herzog's epic film "Fitzcarraldo."

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Peru’s only toy museum houses everything from pre-Inca whistles to lead soldiers and terrifying dolls.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

Now containing the bones of the actual conquistador, instead of someone else.

The Uros people live on floating reed islands in lake Titicaca.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.