depression
Also known as landscape depression, sink, low spot
landform sunken or depressed below the surrounding area
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A watering hole is a natural depression where water collects and animals (such as these impala) come to drink. A karstic closed depression with the permanent lake Stymfalia, in Peloponnese, Greece. Seasonal abundant precipitation is drained by three sinkholes.
In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms.