Above the tree line the ground hardened into flat expanses of rock.

The road they were on ran a little above the flat expanse of land to their left, stretching away twenty-five miles to the coast.

He went down the steps again to the flat expanse of earth.

We met on the wide, flat expanse of the blast pit.

He gazed out over the flat expanse of desert, then at the mountains to the east.

They were standing on a broad, flat expanse of dark gray stone.

He saw the big roof of the laboratory, a flat expanse in the moonlight.

He looked across the flat expanse of ground and confirmed the rising sun.

Standing atop it ten feet above the level, he could see for miles across the flat expanse.

The flat expanse was occupied by a clearing, natural or otherwise.