This nonprofit has been gathering stories, images, and videos of the western portion of San Francisco since 1999, and while you may not have a full afternoon to devote to uncovering parts of San Francisco's history, the one-minute videos will definitely teach you something new. The site boasts approximately 80 minute-long videos — each covering a small snippet of history that could easily be lost to time. Videos range from Playland at the Beach to America's first highway to S.F.'s old dairy ranches. So give yourself a minute and go learn.