After two years of construction, Kings Island opened to public April 29, 1972. The two flagship rides were the Racer and the Enchanted Voyage dark ride through Hanna-Barbera's cartoon land. The Racer was the first twin-track wooden coaster to be built in modern times and at speeds approaching 60 mph, it was the fastest, too. At $2 million, the dark ride was the most expensive attraction in the park. Other popular rides included: the Rotor, the Tumblebug, the Sky Ride, the Spirit of '76, the Wild Mouse, the Scooby-Doo roller coaster, the Spider, the Antique Cars, and the Kings Island & Miami Valley Railroad. www.visitkingsisland.com/media-center/timeline