Son Doong Cave, Vietnam. The largest cave in the world.
Son Doong Cave, Vietnam. The largest cave in the world.
Northern Lights over Tallinn
Sidi Bou Said, Tunisia
Fall Shades
Kaieteur Falls, Guyana
Volcanic Iceland
Spring in the Northwoods - Oneida County, WI, USA
The Matterhorn piercing the Alps
Klyuchevskaya Sopka Stratovolcano in Kamchatka, Russia
Erosion on the slopes of a volcano near Ankisabe, Madagascar
Geiser Black Rock Desert, Nevada
Desolation Wilderness, Sierra Nevada, CA