One of nature’s wonders, Ayres Natural Bridge is one of the few natural bridges in the world that has water flowing under it. We have seen many bridges like the Perrine Bridge in Twin Falls, the Skyway Bridge in Sarasota Florida, the Brooklyn Bridge, and Manhattan Bridge in New York, but never a natural bridge like this one. It was definitely phenomenal. The bridge is part of the Casper Sandstone Formation which was laid down during the Pennsylvanian Age more than 280 million years ago. Time and water eroded a hole in the rock allowing the stream not known as LaPrele Creek to flow through.