There are several, the ones I can remember are: MK beside tinkerbells treasures, in front of BTMRR, next to the Indy car speedway and beside the entrance to Carousel of progress.
MGM: near gertie the dinosaur, opposite star tours, opposite narnia
epcot: theres one in every other 'country', opposite Mission:space, outside the living seas
AK: in Harambe beside the restaurant
in Asia opposite the entrance to flights of wonder
opposite Dinosaur ummm, thata all I can remember, they ARE marked on the maps and they're usually in the quiet peaceful spots, and there are PLENTY