Tri-State Marker, State border marker in Joplin, United States.
The Tri-State Marker is a border monument in Kansas marking the exact point where the boundaries of Kansas, Missouri, and Oklahoma converge. A stone structure and a ground-level plaque sit at this tripoint location for visitors to experience.
A Works Progress Administration project built the stone structure in 1938 as part of Depression-era employment programs. The actual tripoint location sits a short distance east of where visitors stand at the monument.
The marker serves as a geographical education point where visitors learn about state boundaries and territorial divisions in the United States.
The site sits near the highway and is accessible from nearby commercial areas, making it straightforward to find and visit. Adequate parking is available for travelers who want to stop and view the monument.
Visitors can stand on the plaque and position their body to touch three different state jurisdictions at once, making it a rare physical experience. It is uncommon to find a public location where three state boundaries meet at a single, accessible point.
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