Casey Jr. Circus Special running down the track, in the early 60's

Wow, it does not look like it is even in Disneyland.  Casey Jr going around Storybook Land and in the background are some trees.  The biggest change to Disneyland has not been the rides, it has been the landscape.  When the Jungle Cruise first opened it could have been called the Jungle Desert due to the lack of any large trees.
But over the last 60 years the bare spots have filled in and it is hard to imagine the Park without all of the big trees and large bushes.