Landscape Arch is a natural rock arch in Arches National Park in the U.S. state of Utah. With a length of 290.1 feet (88.4 m), it is the longest natural arch in the park and the United States, and the fifth-longest in the world. Landscape Arch was named by Frank Beckwith, who explored the area in the winter of 1933–34 as the leader of a scientific expedition.Photograph credit: Thomas Wolf