Stop by Mexican Museum and learn about past civilizations. Who knows, you may uncover some unusual traditions and beliefs you never even knew existed.
You'll have sightseeing choices galore in Cow Hollow. Mexican Museum is a great place to start here, but there are lots of other worthwhile sights to check out. Pier 39, Golden Gate Bridge, and Alcatraz Island are not far from the exhibition of human history and will round out your day nicely.