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This is one of the most famous and thrilling hikes in the U.S., certain in the Zion National Park. However, it’s not recommended for people who are afraid of heights. The very narrow trail in Zion’s main red rock canyon will definitely test your physical limits. Be prepared for dizzying drop-offs and deep crater views. Don’t forget to ascend Walter’s Wiggles along the way. Easy hikes in this stunning park include the Grotto Trail, Riverside Walk and the Pa’rus Trail. Make sure you also try the Sand Bench Trail, Canyon Overlook Trail and, the most famous and dangerous one, The Narrows.