Take a look at the satellite photo at the following link.
http://terraserver.homeadvisor.msn.com/image.asp?S=10&T=1&X=2115&Y=23454&Z=16&W=2 You can see by the shape of the "bump-out" for the Viper and the then non-existant RagingBull, that they both are over area that used to be parking areas.
True, now those coasters are in a southwestern themed area, but they are over old parking areas.