Knight Foundry, in nearby Sutter Creek about 7 km north of Jackson, is a working museum of 19th-century heavy industry — the last water-powered foundry and machine shop still operating in the United States. The building dates from 1873, and most of the machinery on the floor is from the same era: lathes, drills, planers, and a casting furnace, all driven by Pelton wheels.
Open hours have been limited in recent years as the non-profit volunteers restore equipment, with regular open days and casting demonstrations on selected weekends. Check current schedules before visiting. For anyone interested in industrial history, it is unlike anything else in the western United States.