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Mississippi River	Flows from Minnesota south to the Gulf of Mexico		geo-us-physical-geography
Missouri River	Longest river in the United States; joins the Mississippi near St. Louis		geo-us-physical-geography
Ohio River	Flows from Pittsburgh to the Mississippi at Cairo, Illinois		geo-us-physical-geography
Colorado River	Flows from the Rocky Mountains through the Grand Canyon toward Mexico		geo-us-physical-geography
Columbia River	Flows through Washington and Oregon to the Pacific Ocean		geo-us-physical-geography
Rio Grande	Flows from Colorado through New Mexico, then forms the Texas–Mexico border		geo-us-physical-geography
Hudson River	Flows through New York State to New York Harbor		geo-us-physical-geography
Delaware River	Flows between Pennsylvania and New Jersey		geo-us-physical-geography
Potomac River	Flows past Washington, D.C. to Chesapeake Bay		geo-us-physical-geography
Susquehanna River	Flows through Pennsylvania and Maryland to Chesapeake Bay		geo-us-physical-geography
Tennessee River	Flows through Tennessee, Alabama and Kentucky to the Ohio		geo-us-physical-geography
Arkansas River	Flows from Colorado through Kansas, Oklahoma and Arkansas		geo-us-physical-geography
Platte River	Flows across Nebraska		geo-us-physical-geography
Snake River	Flows through Idaho and Oregon to the Columbia		geo-us-physical-geography
Yukon River	Flows across Alaska to the Bering Sea		geo-us-physical-geography
Connecticut River	The longest river in New England		geo-us-physical-geography
Savannah River	Forms the border of Georgia and South Carolina		geo-us-physical-geography
Rocky Mountains	Run from Canada down to New Mexico		geo-us-physical-geography
Appalachian Mountains	Run along the eastern United States		geo-us-physical-geography
Sierra Nevada	Mountain range in California with Yosemite and Mount Whitney		geo-us-physical-geography
Cascade Range	Mountains with volcanoes in Washington, Oregon and northern California		geo-us-physical-geography
Coast Ranges	Mountains close to the Pacific coast		geo-us-physical-geography
Ozark Plateau	Highlands in Missouri and Arkansas		geo-us-physical-geography
Great Plains	Wide grasslands between the Mississippi River and the Rockies		geo-us-physical-geography
Great Basin	Dry region in Nevada and Utah where rivers do not reach the sea		geo-us-physical-geography
Mojave Desert	Desert in California and Nevada		geo-us-physical-geography
Sonoran Desert	Desert in Arizona with giant saguaro cacti		geo-us-physical-geography
Chihuahuan Desert	Desert in New Mexico and Texas		geo-us-physical-geography
Mississippi Delta	Wide swampy lowland where the Mississippi reaches the Gulf in Louisiana		geo-us-physical-geography
Everglades	A huge wetland in southern Florida		geo-us-physical-geography
Okefenokee Swamp	A large swamp in Georgia and Florida		geo-us-physical-geography
Great Salt Lake	A huge salty lake in Utah		geo-us-physical-geography
Death Valley	Lowest point in North America, in California		geo-us-physical-geography
Mount Whitney	Highest peak in the lower 48 states, in California		geo-us-physical-geography
Denali	Highest peak in the United States, in Alaska		geo-us-physical-geography
Mauna Kea	A big volcano on Hawaii's Big Island		geo-us-physical-geography
Chesapeake Bay	A big bay in Maryland and Virginia		geo-us-physical-geography
Cape Cod	A hooked peninsula in Massachusetts		geo-us-physical-geography
Outer Banks	A string of barrier islands off North Carolina		geo-us-physical-geography
Florida Keys	A chain of small islands off the southern tip of Florida		geo-us-physical-geography
Puget Sound	An inlet of the Pacific in Washington State		geo-us-physical-geography
San Andreas Fault	A fault line in California where earthquakes happen		geo-us-physical-geography
Yellowstone Caldera	A giant volcanic area in Wyoming with geysers		geo-us-physical-geography
Grand Canyon	A mile-deep canyon cut by the Colorado River in Arizona		geo-us-physical-geography
Mount St. Helens	A volcano in Washington State that erupted in 1980		geo-us-physical-geography
Mount Rainier	A big snowy volcano in Washington State		geo-us-physical-geography
Black Hills	Low mountains in South Dakota and Wyoming		geo-us-physical-geography
Badlands	Eroded rock and prairie in South Dakota		geo-us-physical-geography
Aleutian Islands	A long chain of islands extending from Alaska		geo-us-physical-geography
Mount Washington	Highest peak in the northeastern United States, in New Hampshire		geo-us-physical-geography
Mammoth Cave	The longest known cave system, in Kentucky		geo-us-physical-geography
Lake Okeechobee	A big lake in southern Florida		geo-us-physical-geography
Lake Tahoe	A deep mountain lake on the California–Nevada border		geo-us-physical-geography
Crater Lake	The deepest lake in the United States, in Oregon		geo-us-physical-geography
The Continental Divide	A ridge in the Rockies that sends water to the Pacific or the Atlantic side		geo-us-physical-geography