Native American petroglyphs can be seen in Tahquitz, Chino, and Indian Canyons. The Cahuilla's irrigation ditches, dams, and house pits can also be seen here.Baker, Christopher P. (2008). Explorer's Guide Palm Springs & Desert Resorts: A Great Destination. The Countryman Press. p. 31. Ancient petroglyphs, pictographs and mortar holes can be seen in Andreas Canyon. The mortar holes were used to grind acorns into meal.Whitley, David S. (1996). A Guide to Rock Art Sites: Southern California and Southern Nevada. Mountain Press Publishing. pp. 94–96. Baker, Christopher P. (2008). Explorer's Guide Palm Springs & Desert Resorts: A Great Destination. The Countryman Press. p. 216.
