Los Angles plataeu.
A flat area is called a plane. A flat area the is elevated higher than all the surrounding land is called a plateau.
An area of elevated flat land is called a plateau. Plateaus are flat areas of high ground that are usually separated from surrounding areas by steep slopes or cliffs.
The most usual term for large, flat areas is plains.
llanos
abyssal plane
Dark maira of seas
A flat piece of ground is typically called a plain or a plateau, depending on its size and elevation. Plains are low-lying flat areas, while plateaus are elevated flat areas.
Low flat areas of land are called plains. Plains are characterized by their relatively flat, expansive landscapes with minimal elevation changes. They often support diverse ecosystems and are used for agriculture or development.
Maria, or "seas", which is what "maria" means.
They are call Maria ( Latin for "seas" ).
Dry flat lake beds in arid areas are called playas.
Relatively flat, raised areas of land called plateaus.