Oklahoma’s Arcadia Round Barn, a Route 66 landmark, was built in 1898.
Local farmer William Harrison Odor constructed the barn near Arcadia using native bur oak boards. The boards were soaked while green and forced into the curved shapes needed for the walls and roof rafters, creating the building’s distinctive circular form.
The barn predates Route 66 by 28 years. When the numbered highway was commissioned in 1926, its alignment passed through Arcadia and directly beside the barn, turning an already unusual agricultural building into a roadside attraction.
The structure later suffered from neglect as traffic patterns changed. Its roof collapsed in 1988, but volunteers led by Luther Robison rebuilt it, with restoration completed in 1992. The barn is often described as America’s only truly round barn, distinguishing it from barns that are octagonal or otherwise polygonal. Today it serves as a tourism and events site along historic Route 66.