Mineral springs have created the world's largest natural travertine bridge across a canyon. At 400 feet wide, 183 feet high, and 150 feet across, it's so big that you may not realize that you're standing on it when you first walk along the top! Droplets from a small waterfall sparkle in the sun and create rainbows across the giant opening. Easy walks head to overlooks and hiking trails lead to the cave-like interior and springs. The park offers picnic tables, interpretive programs some days, and a gift shop with regional books.

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