From Baxter Springs, go 5 miles east on 166/400, turn right (south) and continue on U.S. 400 for 2 miles to a roundabout, 600 feet west on Downstream, then 1,000 feet south on an unnamed gravel road. At the dead end you'll come to an uncommon stone obelisk monument. Built in 1938 by the National Youth Administration, the marker designates the junction of Kansas, Missouri, and Oklahoma. The original stone marker endures, but unfortunately other tri-state signs have been stolen.