NO. 867 PRESTON CASTLE - The 'Castle,' built in 1890-1894, is the most significant example of Romanesque Revival architecture in the Mother Lode. It was built to house the Preston School of Industry, established by the State Legislature as a progressive action toward rehabilitating, rather than simply imprisoning, juvenile offenders. Doors of the 120-room 'Castle' closed in 1960 after new facilities were completed.
900 Palm Dr, Ione, CA 95640/ Plaque: 4300 Michigan Bar Road, Ione, CA
We originally visited the site in August 2015. We had to return because we missed the plaque. ~~~~~ See picture below for location of site and plaque,