The area initially opened with the park in 1972 as "The Happy Land of Hanna-Barbera" and was later shortened to "Hanna-Barbera Land". One of the area's flagship attractions was a junior wooden roller coaster named "Scooby Doo", which like The Racer was designed by John C. Allen but intended for younger riders. "Enchanted Voyage", an Old Mill dark ride that ferried guests in unaccompanied boats along water-filled guideways, was also a primary attraction that opened with the park. Shaped like a large TV set, the building housed separately-themed areas that made heavy use of animatronic Hanna-Barbera characters. The ride was overhauled for the 1984 season when it became "Smurf's Enchanted Voyage". In 1992, the building was transformed once more into Phantom Theater, replacing the ride's waterways with an Omnimover-style system of transport. It was themed as a behind-the-scenes tour of a haunted theater. The theme and ride vehicles would see additional changes over the years – "Scooby Doo and the Haunted Castle" in 2003 and "Boo Blasters on Boo Hill" in 2010 – but the same underlying transportation system was retained each time.