North Window, Arches National Park, Moab, Utah, USA (© lightphoto/Getty Images)

Just north of Moab, Utah, Arches National Park is home to more than 2,000 natural sandstone arches – the densest concentration of arches in the world. Today's image, North Window, is one of the best-known formations in the park's Windows Section, where towering fins, openings and sculpted sandstone create a landscape that looks almost architectural.