The Clay County Museum at 316 West Glenvil Street in Clay Center is run by the Clay County Historical Society in the former KMMJ radio station building, and admission is free. Its Old Trusty Ag Hall holds the Forest Pense tractor and steam collection, including an Avery 30, a rare Townsend tractor and a 1915 Avery 8-16.
The hall also shows Big Allis, an Allis-Chalmers Corliss steam engine with a 14-foot flywheel that once powered the Ingleside State Hospital. The society sponsors the annual Old Trusty Show at the Clay County Fairgrounds each September.
