Matanuska Glacier Cave, Alaska,more photos after the break...
Sand Dunes, Rub al Khali
Blue Iceberg
Hand of Fatima, Mali
Travertine Chimneys, Djibouti
West Thumb Geyser Basin, Yellowstone
Danakil Desert Landscape
Columns of Basalt
Coastal Plain
Kongou Falls, Gabon
Lascaux Cave, France
Flooded Gabon Forest
