Plains are vast stretches of low-lying land, typically characterized by rolling hills, grassy meadows, and few trees. Synonyms for plains include prairies, savannas, plateaus, steppes, pampas, and tundras. Prairie refers to flat grasslands with few trees and is typically found in North America. Savanna is a grassy, tree-dotted plain with a tropical climate, and is commonly found in Africa. Plateaus are elevated flatlands, while steppes are large flat areas with few trees, found in temperate regions of the world. Pampas refers to the vast grasslands of South America, while tundras refer to flat, treeless regions found in cold climates.