In 2004, The Flintstones Drive In (former The River Princess), Marvel Mania, Popcornopolis, Animal Actors Stage and the Castle Theatre were all located on the Upper Lot (Entertainment Center) at Universal Studios Hollywood. ________________________________________________ #UniversalStudiosHollywood #Flintstones #UniversalCity #MarvelMania #Popcornopolis #AnimalActors #CastleTheatre #UpperLot #EntertainmentCenter #ThemeParkHistory #UniversalStudios #2004Memories #Hollywood #UniversalStudios #NBCUniversal #ThemeParkFans #UniversalCityStudios #HollywoodEntertainment #ThemeParkAttractions #ClassicHollywood #LostAttractions #ReadyForUniversal #UniversalStudiosLot #LifeAtUSH #ThemeParkPhotography #2000s #CowMissing #CowMissingOnYouTube unistudios nbcuarchives thestudiotouronline