(Madonna Inn, CA-40-02) in San Luis Obispo, San Luis Obispo County, CA. Madonna Rd. SW 0.15 miles from jct with US101 on the S. side of San Luis Obispo, right on Madonna Inn Rd. 0.2 miles to the bldg at 100. (N35 16.045 W120 40.479) Photo by Mark Comstock 6-15-06.