The famous canyon in Arizona is the Grand Canyon, known for its immense size and breathtaking landscape. This UNESCO World Heritage site, carved by the Colorado River over millions of years, showcases stunning geological formations and a rich array of colors, particularly at sunrise and sunset. The Grand Canyon is approximately 277 miles long and over a mile deep in some areas, revealing layers of rock that chronicle geological history. It attracts millions of visitors annually for hiking, rafting, and sightseeing. Its immense beauty and ecological significance make it one of the most iconic natural wonders in the United States.