A stream’s waters rush over rocks in the Great Smoky Mountains National Park, Tennessee.
Detail of a railroad rail spotted in Addison, Texas.
A pile of rocks on the rim of Texas’ Palo Duro Canyon.
Prehistoric basalt flows at California’s Mojave National Preserve.
Waves crash onto the rough, rocky shore of the east side of Cozumel, Mexico.
Moss-covered rocks found in the forest near Cherokee, North Carolina.
Distant winter mountains line the horizon as seen from the Great Salt Lake’s Antelope Island, Utah.