A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A seemingly endless landscape of pure salt stretches far across Bolivia.

A walk through the historic city center, under the streets of Seattle.

The fairy tale castle of the "fairy-tale king."

Medicinal spa created with the discharge from a geothermal energy plant.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

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

The rocks in this arid basin leave trails of movement behind them.

Rippling sand dunes frozen in the Arizona rock.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

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

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An emerald-green grotto just a short trip from Austin.

New fungal and bacterial species call this deadly lake home.