On the Holliday and Ripley they used to let one person ride in the tender up front.
Monorail does not allow rear cab seating but you can have up to 4 guests up in the front cab. This may not happen if they are training someone or testing stuff.
In the baby center there is supposed to be a photo of Walt Disney as a baby.
Walk into the castle from the moat. Look down and you will see a round spot on the ground where a surveyor's mark is located. Stand on it and spread your arms wide and spin around while seeing all of the park. You are at the center of
Disneyland in 1955.
At one time the ears on Dumbo were hinged and meant to be controlled by guests so they would flap. That flapped, oops, flopped.
http://www.laughingplace.com/Info-ID-DL-Windows.asp
http://davelandweb.com/mainstreet/windows.html
I would print that or another list like it and walk down Main Street to do your own history tour.
Snow White and the Seven Dwarves were a gift to Disneyland by the maker and are the same size, lol. It is at the wishing well.
Tomorrowland has landscaping that is what the future should be like. There are many citrus trees as you walk along Main Street near the entrance to Tomorrowland and veggies and other edible plants growing all over Tomorrowland. They should not be eaten but people do taste or even eat the landscaping.
There are three tracks at Indiana Jones. You come to a wall with one real door and 3 fakes. The real door lines up with the track you are going on. Ride and take notes that you do not always make a right turn at the doors, lol.
The background music and trash cans are designed to match each area they are in.
I do not know if they still have this but at the Mad Hatter you look in the mirror and the Cheshire Cat Appears. The used to have on the wall Who R U which to me looked like Who..
Disney is famous for saving everything and reusing a lot of stuff. In the Monorail you use to be able to see the motor boats behind Guest Services area on the west site and other stored stuff. America Sings had its stuff moved to Splash Mountain. Stuff form Horizons in WDW was supposedly used in DLR. The pipe organ in Haunted Mansion was a movie prop from 20,000 leagues Under the Sea. Rumour has it that Star Tours is loaded with scrapped DLR stuff posing as space junk.
If you look carefully you will find bullet holes in the glass in the diorama on the train. Those are real animals are taxidermy and some automatronics.