(City of St. Charles) in St. Charles, St. Charles County, MO. Cave Springs (becomes Muegge) Rd. S. 0.75 miles, right & continue S. (curves W.) on Abbydale Dr. 0.4 miles to the tower on the S. side of the road. (N38 46.767 W90 33.899) Photos by Jack & June Schmidt 2-8-15.