(City Emblem #3) in St. Peters, St. Charles County, MO. Cave Springs Rd. S. 0.15 miles from jct with I70 exit 225, W. on Mexico Rd. 0.15 miles, S. on Cave Springs Estate Dr. 0.25 miles, left on Tigonderoga Dr. 0.4 miles to the tank on the left side of the road. (N38 46.945 W90 34.124) Photos by Jack & June Schmidt 2-8-15.