This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

A winding path built in secret on the edge of the continent.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

The largest stone moai on Rapa Nui.

Bioluminescent firefly squid light up this Japanese fishing port.

The hallucinogenic center of the ancient world.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

An underground city of salt.

A Hawaiian stairway to heaven—that you can't climb.

Take a drunken tour inside the world's largest known geode.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

A marvel of Byzantine engineering under the streets of Istanbul.

In paradise, feral pigs have claimed an island all to themselves.

Tubing through a cave lit with glowworms is a magical underground experience.

Pompeii's less famous neighbor is still revealing her secrets.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Walk 2,300 feet above the ground on the "Troll's Tongue."

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Roman ruins top white travertine terraces formed by ancient hot springs.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.