The highlight of the tour was the Southern California Edison Building because we were actually able to go inside and also I think it really captured the essence of Art Deco.
The Eastern Columbia Building was interesting as well which has now been turned into lofts. Our tour guide actually said that Johnny Depp owns a penthouse on the top of the building but don't quote me on that. In total we covered a good part of historic downtown which took about 2 1/2 hours. I really recommend going on a tour if you want to see a different part of LA! Tickets are $10 each or $5 if you become a member of the conservancy.