Seven Natural Wonders of the United States

BriefGeo’s pick of the country’s greatest natural spectacles.

There is no official list of America’s natural wonders, so this is ours: seven places that show the full range of the country’s geography, from a mile-deep canyon and a supervolcano to the tallest peak in North America, the longest cave on Earth and a river of grass. Each is the best of its kind in the United States.

#	Place	Why it's here
1	The Grand Canyon Northern Arizona	A mile-deep gorge cut by the Colorado River
2	Yellowstone National Park Wyoming, Montana, Idaho	A supervolcano with half the world’s geysers
3	Denali (Mount McKinley) Alaska Range, Alaska	North America’s highest peak, 20,310 ft
4	Niagara Falls Niagara River, New York–Ontario border	The most powerful waterfall in North America
5	Hawaii Volcanoes National Park Hawaii	Kīlauea and Mauna Loa, two of the world’s most active volcanoes
6	Mammoth Cave National Park Edmonson, Hart and Barren counties, Kentucky	The longest known cave system on Earth
7	The Everglades South Florida	A slow-moving river of grass across South Florida

Place

Why it's here