5.Rainbow Bridge – Tallest natural bridge in the U.S.
The amazing natural structure at Rainbow Bridge National Monument in southern Utah is often described as the world’s highest natural bridge. The bridge is estimated to be more than 200 million years old. It is 290 feet tall, at the top it is 42 feet thick and 33 feet wide. Rainbow Bridge was known for centuries by the Native Americans who have long held the bridge sacred.
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