Agua Caliente Hill Trail, Point 3321, Sunset and Night – 10/4/2015 Updated May 26, 2019 - Posted October 6, 2015 - Charles Miles Sunset from the Agua Caliente Hill Trail. October 2015. Tucson City Lights from Point 3321 off the Agua Caliente Hill Trail. October 2015. Mount Bigelow in the stars – looking up from Point 3321 off the Agua Caliente Hill Trail. October 2015.