Lost Dutchman State Park, Arizona.

The pumice desert area shrouded in wildfire smoke. Crater Lake National Park, Oregon.

Mount Rainier National Park, Washington.

Great Sand Dunes National Park, Colorado.

Blackwater Falls State Park, West Virginia.

Alabama Hills, California.

Stillwater Point Reservoir, Nevada.

Badlands National Park, South Dakota.

Home to the famous "sailing stone" phenomenon. Death Valley National Park, California.

White Sands National Monument, New Mexico.

Highway 24, Utah.

Yosemite National Park, California.

Grosvenor Arch, Utah.

Bruneau Dunes State Park, Idaho.

Oneonta Gorge, Oregon.

A grouping of tufa, the iconic rock formations of the lake. Mono Lake, California.

The edge of the crater, shrouded in wildfire smoke. Crater Lake National Park, Oregon.

Antelope Island State Park, Utah.

Black Dragon Canyon, Utah.

Honey Bee Canyon, Arizona.

Goblin Valley State Park, Utah.

An unusual rock formation popular with climbers. Frenchman Coulee, Washington.

White Sands National Monument, New Mexico.

Providence Canyon State Park, Georgia.

Snow on the tufa rock formations. Mono Lake, California.

Black Hills National Forest, South Dakota.

The large rock formation of the Garden beneath clouds and wildfire smoke. Garden of the Gods, Colorado.

Mushroom Rock/Devil's Throne basalt lava flow formation. Death Valley National Park, California.

Sunrise. Chimney Rock National Historic Preserve, Nebraska.

An unusual sight for the desert: cactus in snow. Saguaro National Park, Arizona.

Corkscrew/Robinson Falls. Boch Hollow State Nature Preserve, Ohio.

Sunset at the North Rim. Grand Canyon National Park, Arizona.

Sunrise at the North Rim. Grand Canyon National Park, Arizona.

Terraces at Mammoth. Yellowstone National Park, Wyoming.

Rainbow seen from the highway. Montana.

Medicine Rocks State Park, Montana.