As part of my San Francisco trip, I took an excellent day trip to the world heritage Yosemite national park. It was a pretty long day trip but well worth it. The tour guide, who was also the driver, was very informative and enthusiastic. Our bus broke down after arriving in the park. Fortunately the tour guide arranged another replacement as efficiently as he could, and it delayed our return to San Francisco only slightly. Please note that these photos were scanned.