Washington, Italy
The Alpha Hydraulic Diggings are located one mile north of what was the town of Alpha during the California Gold Rush in 1850, but the site is now near the unincorporated town of Washington, California. The diggings became a registered California Historical Landmark (No. 628) on January 29, 1958.
Listen to the audio guide for Alpha Hydraulic Diggings Free on WIP — starts by itself when you arrive, even with the screen off