Blue-Green Algae bloom, Lake Erie, US

(OC) The Mojave Desert wilderness in Joshua Tree National Park.

1000 year old Yew trees in Wales

Yosemite Under Moonlight

The Twelve Apostles, Australia

Athabasca Glacier at night, Jasper National Park

Mayon Volcano's Perfect Cone, Philippines

Mountain in Gates of the Arctic National Park, Alaska

Yosemite National Park 2

Maroon Lake, Aspen, Colorado

Path at a Irish Campsite

Rainbow over Bora Bora

Yellowstone National Park Hot Springs