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Which river flows through the Grand Canyon?
- Mississippi River
- Colorado River
- Columbia River
- Rio Grande
Answer: Colorado River
The Colorado River carved the Grand Canyon over millions of years through erosion. The canyon, located in Arizona, USA, is about 446 km long, up to 29 km wide, and over 1.6 km deep. It is one of the Seven Natural Wonders of the World and a UNESCO World Heritage Site.