Proportions are also off due to many blank areas being staff-only areas that were instead filled with trees. Various proportions are off (mostly due to RCT3’s isometric placement of everything, it was difficult to get everything to line up since real parks rarely follow strictly 90/45-degree angles).Today only two of those coasters are still standing, Demon and Whizzer. In 1976, the hospitality corporation, Marriott, opened Marriotts Great America, a premier theme park with plenty of rides, shows, games, and 3 roller coasters. El Sombrero in wrong place/Mexico’s tea cups are not included (when the park was started long ago, El Sombrero was in its old location (by La Vibora)) A RCT3 re-creation of Six Flags Great America in Gurnee IL, a city just north of Chicago.Various Looney Tunes and other flat rides are “wrong” since RCT3 didn’t include them.Here are a few good links to places where you can download custom mods: The 'Amazing Earls' site ae. Sadly, quite a few of the modding sites for RCT shut down but some are still up and running. This was due to size limitations and a layout that was difficult to determine due to satellite images being of little use (too many trees block the ride’s layout). Before you start doing anything, youre gonna have to download custom rides/scenery. RCT3’s max park size was reached and there simply wasn’t any room to include it while maintaining an otherwise accurate park layout.