Is the U.S. Land Flat or Rolling? It's Both—and More

The United States exhibits extraordinary terrain diversity:

• Flat: Great Plains, Coastal Plains, Central Valley (CA).
• Rolling/Upland: Appalachian foothills, Ozarks, Piedmont.
• Mountainous/Rugged: Rockies, Sierra Nevada, Cascades, Grand Canyon, Basin & Range.
• Other: Volcanic (Hawaii, Alaska), glacial (Upper Midwest), karst (Florida, Kentucky).

No single descriptor captures the continent-spanning variety of the U.S. landscape.