The type of low, flat land left behind after a large body of water like a lake disappears is called a playa.

Here's a bit more about playas:

* Formation: Playas form when lakes or other bodies of water dry up due to changes in climate or drainage patterns.

* Characteristics: Playas are typically flat, dry, and often covered in salt, clay, or other minerals deposited by the receding water.

* Location: They are commonly found in arid and semi-arid regions, where evaporation exceeds precipitation.

* Variations: Depending on the size and previous water body, playas can range from small, shallow depressions to large, expansive plains.

Let me know if you'd like to know more about playas!