- City Guides
Museum on Main
603 Main Street, Pleasanton, CA 94566
This small museum in downtown Pleasanton, Calif., has information about the history of the city and the Amador-Livermore Valley in Alameda County. Admission is free. Access to the full collection of nearly 10,000 objects is available by appointment. During the Gold Rush, the area had a reputation as a haven for outlaws.