Viedma Glacier in Patagonia, Argentina

Viedma Glacier in Patagonia, Argentina

Ofaerufoss waterfall on Eldja volcanic rift, Iceland

Ofaerufoss waterfall on Eldja volcanic rift, Iceland

Colorful kayaks at Bulusan Lake, Luzon, Philippines

Colorful kayaks at Bulusan Lake, Luzon, Philippines

California

California

Panoramic view of Cirque de Mafate, a volcanic caldera in Reunion Island

Panoramic view of Cirque de Mafate, a volcanic caldera in Reunion Island

Melting water streams from iceberg in Disko Bay, Greenland

Melting water streams from iceberg in Disko Bay, Greenland

Amazon River, Brazil.

Amazon River, Brazil.

Maletsunyane Falls located near the town of Semonkong in Lesotho

Maletsunyane Falls located near the town of Semonkong in Lesotho