The most alien-looking place on Earth.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

A battle between nature and architecture in the Cambodian jungle.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Stunning wetlands ablaze with pink lotus flowers.

A swing to dangle you off the very edge.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

An exquisite tunnel of cascading flowers.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

Quite simply the largest tree in the world (by volume).

This private residence was the template for one of the most beloved television homes of all time.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Rippling sand dunes frozen in the Arizona rock.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.