The Asylum Bridge which crosses the Marais des Cygnes River at First Street, is listed on the National Register of Historic Places. It was built during a three month period--October thru December, 1905, by the Kansas City Bridge Company, Kansas City, Mo. Its bid of $4,800
The Pottawatomie Creek Bridge which spans Pottawatomie Creek at Sixth Street is one of two Marsh Arch triple span bridges located at Osawatomie. The other spans the Marias de Cygnes River at Eighth Street, and both are listed on the National Register of Historic Places.