A red-rock wonderland. Visit Arches to discover a landscape of contrasting colors, land forms and textures unlike any other in the world. The park has over 2,000 natural stone arches, in addition to hundreds of soaring pinnacles, massive fins and giant balanced rocks. This red-rock wonderland will amaze you with its formations, refresh you with its trails, and inspire you with its sunsets. The Geology of Arches National Park. Why are there so many arches here? How do they form? Learn all about the geology and the famous namesake features of Arches National Park.