Russia is the largest country in the world, spanning 11 time zones. It has a total land area of 6.602 million square miles.
THE ANSWER IS THE SIBERIAN PENENSULA
16,995,800 square kilometers
Tundra
a large area of flat unforested grassland in southeastern Europe or Siberia.
A steppe is not a body of water. This is a land form which consists of a large flat grassland area which is not forested in Siberia of SE Europe.
savanna - a flat grassland.
Serengeti Plain
Moutains, Flat plains, rivers, and swamps.
The most usual term for large, flat areas is plains.
A large area of treeless grassland can be a plain, savanna or prairie.
savannahs
plains
Steppes are large areas of flat grassy land where there are no trees, especially the area that stretches from Eastern Europe across the south of the former Soviet Union to Siberia. The horse galloped across the steppe.
A prairie is a large area of flat or rolling, predominantly treeless grassland, much larger than a field .
Abyssal Plain. :)