d) Hells Canyon, Idaho

Hells Canyon in Idaho is the deepest canyon in the United States. Carved by the Snake River, it reaches depths of over 7,900 feet in some areas, surpassing even the Grand Canyon in depth. Hells Canyon’s rugged and remote landscape offers breathtaking scenery and is a haven for outdoor activities like hiking, whitewater rafting, and fishing. Its depth and unique geological features make it a remarkable natural wonder, showcasing the powerful forces of nature that have shaped the American landscape.