Arches National Park is home to over 2000 documented arches. Double Arch is one of the more striking arches, and was formed in part by errosion from above. A walk beneath these thick stone spans, which reach a height of 104 ft. (31m), is awe inspiring.
The unique geography in Arches National Park is a product of movement in a large subsurface salt layer, according to the theory espoused by the National Park Service and others. These formations are an enigma, and I've often wondered if some of the explainations presented are only partially true. - Martin van Hemert