Tonto Natural Bridge State Park, PineFew natural structures in Arizona pack as much visual punch per dollar as the enormous travertine bridge at Tonto Natural Bridge State Park. The cool mist near the water on a hot Arizona day feels like a genuine reward after the climb down. Patagonia Lake State Park, PatagoniaSouthern Arizona does not immediately bring lake beaches to mind, but Patagonia Lake State Park makes a convincing argument for rethinking that assumption. Oracle State Park, OracleSpread across more than 4,000 acres in the foothills of the Santa Catalina Mountains, Oracle State Park offers a scale and variety that surprises most first-time visitors. Colorado River State Historic Park, YumaMost Arizona day trips lean heavily on wilderness and wide-open landscapes, which makes Colorado River State Historic Park in Yuma a refreshing change of pace.