Delicate Arch (way in the distance, right of top center) - Arches National Park, UT. Delicate Arch is the trademark arch of Arches National Park. The arch is a remnant of a fin -a thin sandstone wall- of Entrada Sandstone, gradually the erosion has worn away the rest of the fin leaving a free-standing arch. The opening is 4-stories tall. Film Size 4X5