The endemic lava cactus (Brachycereus spp) cactus growing in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Boundary gate and cattle-proof fence between Coconino National Forest and Wet Beaver Creek Wilderness, Arizona, United States of America

The endemic lava cactus (Brachycereus spp) cactus growing in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Aerial view from helicopter, of a farm in an ancient oasis in the desert with canyons of the Ashar Valley,AlUla, Medina Province, Saudi Arabia

Rocky mountain in Zouar, Tibesti Mountains, Chad

Truck stuck in the sand dunes of the Tibesti Mountains, Chad

Tyre marks and tracks in the playa salt pan surface of Black Rock Desert, Nevada, Black Rock Desert, Nevada, USA

Man with camera and tripod on the flat saltpan or playa of Black Rock desert, Nevada, Black Rock Desert, Nevada, USA

Man aiming hand gun, standing in vast, barren desert, Black Rock Desert, Nevada, USA

A railroad extending through the desert, near Wendover in Utah, Umatilla County, Oregon, USA