Disney Parks enshroud guests in a theme in every way possible; appearance first, and scents, and lastly, subtle background music. This background music is coveted by many Disney-goers, and is also rather difficult to find, but VAULTDISNEYreturns over on YouTube has gathered some of this music and set it to a slide show of attraction pictures, Enjoy!
Expedition Everest Background Music
I find this music very soothing and semi-hypnotic.
The Land Pavalion Background Music
This is really just "Listen to the Land" slowed down, and instrumental.
Canada Showcase Background Music
Weird western/?= awesome!