Arches National Park, Utah
Scientists have many theories as to how the natural stone arches of Arches National Park formed. As a self-proclaimed scientist, I believe arches (such as Double Arch below) were formed by dwarves.
Other scientists think it has something to do with some salt and faults deep underground that caused vertical cracks. Then eventually water (both rain and ice) as well as wind eroded some of these cracks enough to form arches. But what do they know.
Had a great time hiking around Arches today, especially beautiful during sunset to get those beautiful reddish colors.
Sand Dune Arch (arch hidden inside, but pretty colors):