A 150-acre county park built on what was, a century ago, the largest single vineyard in the world — the Italian-Swiss Colony's Guasti vineyard, which once covered 5,000 acres of the valley floor. The vines are long gone, but the park preserves a chunk of open green space with two stocked lakes for fishing, a swimming lagoon, pedal boat rentals, and large picnic areas.
A waterslide complex operates on summer weekends. Good for a family day out and one of the few genuinely green public spaces in this part of the Inland Empire. Small per-car entrance fee.