Sulfur, salt, and other minerals color the crater of Ethiopia’s Dallol volcano.

Sunlight sneaks through a crevice in Antelope Canyon near Page, Arizona.

A wall of flames from a forest fire partially obscures the sun in the western U.S.

Blossoms soften a hill terraced by cattle trails in California’s Briones Regional Park.

Mud tracks ripple like melted chocolate after a flood washed through a slot canyon in Arizona.