slgwv's photos with the keyword: dried

Or "desiccation cracks," more formally. On the dry floor of Stampede Reservoir, California. Altho here they're a result of the drought, at least they're a good example of a common sedimentary phenomenon!

"Playa" is literally "beach" in Spanish, but in the deserts of North America it also means a dry lake bed. Presumably it's a Mexican-Spanish usage imported into English.