Close-up of plant, Cueva de Los Verdes, cave tourist attraction in lava pipe tunnel, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Cactus plants inside Jardin de Cactus designed by Cesar Manrique, Guatiza, Lanzarote, Canary Islands, Spain, Atlantic, Europe

Dry stone wall and towering cliffs of basalt lava over Jurassic sediments at the Quiraing, a famous hike and scenic attraction in the far north east of the island, Quiraing, Staffin, Skye, Inner Hebrides, Scotland, United Kingdom, Europe

January 22, 2011 - Lava Lake in bottom of summit caldera, Nyiragongo Volcano, Democratic Republic of the Congo.

January 21, 2011 - Nighttime view of summit caldera with lava lake, Nyiragongo Volcano, Democratic Republic Congo.

January 30, 2011 - Lava lake illuminating walls of pit crater at nightfall, Erta Ale volcano, Danakil Depression, Ethiopia.

January 30, 2011 - Lava lake illuminating walls of pit crater at nightfall, Erta Ale volcano, Danakil Depression, Ethiopia.

Vinery, La Geria, Lanzarote, Canary Islands, Spain

Vinery, La Geria, Lanzarote, Canary Islands, Spain

Horse in a road with hydrangea flower, Caldeira de Guilherme Moniz, Terceira, Azores Island, Portugal, Europe

A Vertical Wall Of Solidified Lava Forms Hexagonal Shapes On The Snaefellsnes Peninsula, Iceland

A group of divers and a manta ray (Manta alfredi) on one of the corners of the Backwall at Molokini Marine Preserve, Maui, Hawaii, United States of America

The Backwall at Molokini Marine Preserve drops down to 300 feet. Various reef fish stick close to a crevice here, Molokini, Maui, Hawaii, United States of America