Arches National Monument, Utah.
Sandstone, Slot Canyon, Arizona.
Microscopic view of petrified wood.
Moss covered vertical rock structure.
Rock formations, Goblin Valley, Utah.
Moss covered rocky waterfall.
Blue ice-berg, Antarctic.
Zebras at African waterhole.
California High Sierra linear plant.
Fall colored leaves and branches.
Bristlecone Pine, White Mountains, California.
Snow covered tree branches.
Ancient Southeast Asian tree trunks.