A glacier near the summit of Mt. Kilimanjaro, elevation 18,600ft.

Turquoise ice at Lake Baikal, by Alexey Trofimov

Bryce Canyon National Park

Midnight sun by a lake in Troms, Norway. Photo taken at 03:00 (3 am).

The Fairy Pools on the Isle of Skye, Scotland

A desert in the middle of Iran. Photo by Arash Karimi

Iguazu Falls, Brazil

Zhangjiajie National Forest Park, China 3

Blue-Green Algae bloom, Lake Erie, US

Königsee, Germany

Rainbow over Cathedral Rock: Sedona, AZ, USA

Half Dome, Yosemite Valley

Prusik Peak, WA