In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms.
A watering hole is a natural depression where water collects and animals come to drink.
Karst closed depression with permanent lake Stymfalia, Peloponnese, Greece. Seasonal abundant precipitation drained by 3 sinkholes
A watering hole or waterhole is a geological depression in which a body of water forms, usually a pond or a small lake.
A watering hole is "a sunken area of land that fills with water".
A watering hole is a natural geological depression where water collects