We went on a horse & carriage ride. They offer the carriage ride at Disney's Port Orleans Riverside Resort. I think they also offer it at one of the other resorts.
I have to agree that a spa treatment would be nice after all the walking.
However...I am a great husband and have traded services with my business and she gets all the spa treatments she wants (and the guy is so skilled that she dreads other massage therapists.)
Also it needs to be an alone thing...she needs this to be just her...I was pondering a NICE breakfast at another resort.
I forgot about those tours. She would love a behind the scene tour of anything. I did the massive behind the scene tour (the one that takes all day and LOVEd it.)
I've been looking for tips for my mom. Spa treatment, tours, and afternoon tea have been the main suggestions (but, well, afternoon tea is in the afternoon.) Someone suggested dining with an imagineer, too.