Knott's Berry Farm-rides, attractions, historical exhibits, emphasis on learning, one of the first theme parks
Walt Disney World-four major theme parks based on all aspects of entertainment and learning
Universal Studios-movie sets, rides, attractions, adaptation of movies into thrill rides and commitment to guest participation
SeaWorld Entertainment-largest corporate owned theme/animal park, a leader in conservation and education, development of educational programs based on animal, conservation and environmental issues
Six Flags-largest regional US theme park, parks in forty of the fifty metropolitan areas in the U.S., licensing agreements with DC comics and Warner Brothers
Hershey Park-originally developed for employees to relax and have fun when not at work, chocolate theme
Others include Dollywood, LegoLand, GatorLand, Wet 'n Wild.