Six Flags Discovery Kingdom is Northern California's only combined marine life, wildlife and wild rides theme park delivering Northern California's best family entertainment experience. Our 135-acre park features three worlds in one kingdom, with exciting wildlife shows, interactive animal encounters and exhibits and the most daring and thrilling roller coasters around. You'll experience a full day of fun and discovery as your adventure includes enjoyment of over 40 rides and attractions, plus wildlife encounters, with such opportunities to feed a dolphin, giraffe or even a sea lion! Sign up to participate in our popular dolphin swim program and really get to know these engaging marine mammals one-on-one. With seven world-class roller coasters, you won't want to miss Medusa with its 150-foot plunge and the one-of-a-kind SUPERMAN Ultimate Flight!