Visited the San Diego History Center in Balboa Park to see the Comic Con: The Early Years exhibit. It was a surprisingly minimal presentation with only three small display cases in the middle of a large open area. For the $6.00 admission that I paid I stayed and went through the rest of the museum, which took less than an hour. Spent another half an hour walking around the park, including strolling through the Arboretum, taking lots of pictures.
