California's largest hydraulic mine left behind massive gold and crimson cliffs, which were carved from the mountains by mighty streams of water. The forestland has recovered since the legal battles between mine owners and downstream farmers shut down the mine in 1884, and makes for a pleasant hike. Join the tour of the ghost town at the museum (open May through September from 10am-4pm Fri-Sun, tour at 1:30) or stay overnight in one of three humble miner's cabins ($40/night).