The Spanish architecture of the buildings was amazing. The fact that there were so many buildings with this architecture and that they were kept up so well is what surprised me. We visited the Chocolate exhibit at the Natural History Museum and really enjoyed it - even my 9 and 11 year old sons. Tip: If you have a California Science Museum annual pass, you can get your whole family in for free to both the Natural History Museum and Ruben H. Fleet Science Museum. A great deal.