i just finished that quest, used the bucket of water to kill the witch... talked to the town mayor, yada, got back in the balloon, and it took me back to the first map >.< i would really like to do the turkey event,

how do i get off this munchkin map?

Every sub-map has a square on it that will bring up the main map. And there is a square on the main map that will bring you to every one of the sub maps.
The sub maps are:
Scientists Castle
Underwater
Far Away Lands (Oz)
Buried Pyramid
Center of the Earth
Wonderous Lands (Alice)
and Haven Crypts
and holiday events too.

With 2 mouse clicks you can go from one square anywhere to anywhere else, actually 3 if you go from one submap to another one.

Or you can walk out of every area or int oevery area. But actually I think that balloon ride is one way, so do what's described initially above.