I am Six flags Discovery . Six Flags Discovery Kingdom is a 135-acre park that offers a full day of family fun and adventure as the area’s most unique wildlife and theme park experience. As a destination attraction, guests can enjoy the most thrilling roller coasters around, family rides and attractions, great shows and live entertainment, plus one-of-a-kind, up-close animal experiences that will create memories that last a lifetime. a 135-acre (55 ha) animal theme park located in Vallejo, Calif