Open country
All over the earth there are great flat places. The level or gently
rolling land goes on for miles (kilometers). These flat parts of the
earth are called plains.
Most plains are lower than the land around them.
It might seem, then, that plains would be on the lowest parts of the
land. But this is not always so. Coastal plains are low, and usually
slope gently upward from sea level. But inland plains, such as the Great
Plains in the United States, are often thousands of feet (meters) above
sea level.
Serengeti Plain, Tanzania
