A meadow is a possibility.
Swarm
The term "down" for a large grassy area comes from Old English, where it referred to a rolling hill or expanse of open land. The term has since evolved to specifically refer to large open areas covered in grass, common in regions like England.
A large piece of flat land is called a plain. A desert is a dry, barren area with little vegetation. A mountain is a raised landform with a peak or summit.
A large area of flat land is called a plain. Plains are typically characterized by low levels of elevation and minimal variation in topography. They are often found in between mountain ranges or along coastlines.
Generally speaking a plain lacks physical beauty and is not per se ugly. A plain is a large expanse of land and considered open country lacking mountain ranges for example. In comparison a plateau is much like a plain with the important distinction of being an elevated open expanse of land.
Swarm
a broad area of flat or gently rolling land is called a plain.
a plain
Plateau
Plateau
I think this answer is plain.
Plateau
I think this answer is plain.
Plateau
Plateau
Plateau
A Plateau.