The Grosvenor Arch measures up to 30 meters in diameter and is absolutely impressive. If you dare to take the Cottonwood Canyon Road in Grand-Staircase Escalante, you should visit the double arch. A short hiking trail leads to the foot of this fascinating natural monument. By the way, the Grosvenor Arch is named after Gilbert Hovey Grosvenor, the first permanent editor of the National Geographic Magazine. He headed the magazine as editor-in-chief for 55 years.