Summer solstice at noon and sunset. Chaco Canyon, cardinal orientations, meridian alignment, inter-pueblo alignments The 3-Slab Site[23] atop Fajada Butte in Chaco Canyon, which marks the solstices. Chimney Rock Archaeological Area, near Pagosa Springs, Colorado Cliff Palace[24] in Mesa Verde National Park Crack Cave at Picture Canyon (Colorado) in Comanche National Grassland Emerald Mound and Village Site, Lebanon, Illinois Haleets on Bainbridge Island in Washington state Hovenweep Castle[25] Holly Solstice Panel in Hovenweep National Monument Moorehead Circle, timber circle in Ohio Octagon Earthworks[26] Serpent Mound Skystone near Naches Trail in Washington state Wally's Dome in Sacramento Mountains (New Mexico)[27]