Desert watering holes, also known as oases, are areas of water in the desert that provide a source of sustenance for animals and humans. They are often surrounded by lush vegetation, providing a stark contrast to the arid environment of the desert. Oases are formed when underground aquifers are brought to the surface by natural springs or by human intervention. These watering holes are essential for survival in the desert, and can be found in many deserts around the world.