Iconic stone arch collapses in southern Utah park One of the largest and most photographed arches in Arches National Park has collapsed. Paul Henderson, the park's chief of interpretation, said Wall Arch collapsed sometime late Monday or early Tuesday. The arch is along Devils Garden Trail, one of the most popular in the park. For years, the arch has been a favorite stopping point for photographers. Henderson said the arch was claimed by forces that will eventually destroy others in the park: gravity and erosion. "They all let go after a while," he said Friday. He said it's the first collapse of a major arch in the park since nearby Landscape Arch fell in 1991. No one has reported seeing it fall. Like others in the park, Wall Arch was formed by entrada sandstone that was whittled down over time into its distinctive and photogenic formation....