The filming location of Monty Python and the Holy Grail, Outlander and others

Doune Castle was a very grand and impenetrable fortification in its day.
More recently it has been the filming location of Monty Python and the Holy Grail, Outlander and others.
Disabled access is very limited with lots of staircases to climb to see the see whole inside of the building. I wasn't able to see some parts as I use a walking stick and the spiral staircases were a no no for me.