The U.S. state that is home to the Grand Canyon is Arizona. This iconic natural landmark, carved by the Colorado River, is one of the most visited national parks in the United States. The Grand Canyon showcases stunning geological formations, diverse ecosystems, and provides breathtaking views of layered rock formations that tell the story of Earth's history. Spanning over 277 miles long, it attracts millions of visitors each year for hiking, rafting, and sightseeing, making it a significant cultural and natural treasure.