Suspension bridge (Heritage) across Shiawassee River in Curwood Castle Park in Owosso, Shiawassee County, MI. MI21 (Main St.) E. 1 block from jct with MI52 (Shiawassee St.) in Owosso, N. on Curwood Castle Dr. 0.1 miles to the bridge on the E. side of the road. (10-22-04, N42 59.94 W84 10.48) Photo by Mark Comstock.