Playa is the Spanish word that means shore or beach. It is also called pan, flat, or dry lake. It is the basin from which water evaporates quickly. ... These types of lakes have the flattest form of geographical features in the whole world. It is also called a sink.
The definition of a wadi is a valley, oasis, stream bed, etc. that is only wet during the wet season. An example of a wadi is a stream that dries up completely during the dry season. ... A gully or streambed in northern Africa and southwest Asia that remains dry except during the rainy season.
They were forms of transportation
