These are two photographs or Owachomo Bridge which is one of three significant water carved bridges found in Natural Bridges national Monument in Utah. Owachomo is 106 feet high, has a span of 180 feet and is 27 feet wide and 9 feet thick. Owachomo is located near the intersection of Tuwa and Armstrong Canyons. The bridges are made of Ceda Mesa Sandstone from the Permian geologic period which predates the stone in Monument Valley and is even older than Arches national Park. The stone was form 570 to 240 million years ago. I heard this in grade school but I had to do a little research on the details. This is one of the unknown National Monuments which most people never have seen nor heard of.