Sutter's Mill is a historic site located in Coloma, California, known for its role in the California Gold Rush. In 1848, gold was discovered at the mill by James W. Marshall while he was working on the construction of a sawmill for John Sutter. This discovery led to a massive influx of people seeking fortune, dramatically changing the region's population and economy. The site of Sutter's Mill is now part of the California State Parks system, where visitors can learn about the gold rush era and its impact on American history. The original mill no longer exists, but the area features a replica and various exhibits that celebrate the significance of this landmark in the quest for gold.