A few years back I would occasionally be asked to go to the top of Cinderella Castle to check on and/or photograph something. As you can imagine, the views are amazing. I felt like that guy in old videos on top of a tower during park construction taking time-lapse and still photography. How cool of a job that would have been.
I had assumed in earlier years that there was a nice little elevator to the top of the tallest spire with a room for Tinkerbell to relax in until the fireworks. Of course the spire is far too narrow for any such thing. There is however an elevator that goes to what is now the Castle Suite, which was then a small office and small storage space. From there a door leads to one level of rooftop on the east side of the castle facing Tomorrowland. Metal ladders bolted to the ground and walls lead you from one level of rooftop to the next.
A small wooden door at the base of the tallest spire opens to a tall narrow shaft with another metal ladder leading to the top of the spire. Harnesses are required if you wish to ascend to the highest point of the castle. At the top of the very tall ladder is a wooden door which opens to a small wooden platform hardly large enough for two people to sit on.
It's great to sit up there and take in the views. You can see for miles. It was a joy to see the Magic Kingdom and distant Epcot all at the same time.