Fredreic J. Brown/AFP
Festival goers arriving at sunset attend the first day of Wasteland Weekend in the high desert community of California City in the Mojave Desert, California, where people are gathering for the world’s largest post-apocalyptic festival
An Egyptian guide nuzzles a camel at the Giza pyramids, on the southern outskirts of Cairo, on Monday
A Mutant Vehicle made up like a polar bear drives through the dust during the Burning Man 2015 “Carnival of Mirrors” arts and music festival in the Black Rock Desert of Nevada
The sun rises from behind the Hajar Mountains as one of the world’s largest hot air balloons carries 24 passengers flying over the Margham desert about 60 km (37 miles) southeast of Dubai, United Arab Emirates
A man walks with his camels in M’hamid el-Ghizlane, in the Moroccan southern Sahara desert.
The Danakil Depression in Ethiopia is one of the hottest and harshest environments on earth, with an average annual temperature of 94 degrees Fahrenheit (34.4 Celsius). For centuries, merchants have traveled there with caravans of camels to collect salt from the surface of the vast desert basin. The mineral is extracted and shaped into slabs, then loaded onto the animals before being transported back across the desert so that it can be sold around the country.