Katie traveled to Arizona and Utah with her grandparents and visited several national parks and forests, including Bryce Canyon. Bryce Canyon features many vibrantly colored rock formations carved by erosion from water freezing and thawing in cracks in the rock. The pink color comes from iron particles in the rock rusting when exposed to air. It took 65 million years for wind and water to sculpt Bryce Canyon into its amazing spires and arches.