Potash Evaporation Ponds in Utah

These electric blue shapes in the brown desert are potash evaporation ponds managed by Intrepid Potash Inc. the United States’ largest producer of potassium chloride, and are located along the Colorado River, about 30 km west of Moab, Utah. 

These ponds measure 1.5 square kilometers, and are lined with rubber to keep the salts in. Unlike other salt evaporation ponds that get a naturally reddish tinge due to the presence of certain algae, the bright blue color of these potash evaporation ponds come from an artificially added dye that aids the absorption of sunlight and evaporation. Once the potassium and salts are left behind, they are gathered and sent off for processing. (Source)