Pinnacles National Park in between Salinas CA and San Jose CA. There is quite a bit of hiking, some rock climbing and 2 caves. The caves aren't normal caves that we think of, but they were fun none the less and provided a nice chance to cool off. It gets pretty hot especially in the summer heat so pack lots of water and salty foods to keep you well nourished. We really liked looking at the rock formations as we hiked along.