A common pool of water found in a desert environment is known as an oasis. An oasis is characterized by the presence of water, often found in a depression or low area, surrounded by vegetation, which provides a stark contrast to the arid landscape. Oases are vital for wildlife and human settlements, offering irrigation for agriculture and a refuge for various species. These water sources are typically formed by underground rivers or springs that surface in the desert, making them crucial for survival in otherwise harsh conditions.