About four hours from San Francisco is Yosemite National Park, set in the majestic Sierra Nevada mountains and home to some of the best waterfalls in North America. The granite cliffs of El Capitan and Half Dome are a big draw for mountain climbers, but there's just about any attraction you can think of here, including a village with restaurants, stores, and a museum. It's impossible to overstate the beauty of this place, so try to make some time in your itinerary to reach it. There are many campgrounds with varying degrees of comfort, and you can also rent cabins.