From 1972 to 1976, Kings Island grew rapidly after opening to the public in 1972 following two years of construction as a replacement for Cincinnati's Coney Island, which suffered frequent flooding and had too little room to expand. The new park was organized into five themed areas—International Street, Coney Island, Oktoberfest, Rivertown, and The Happy Land of Hanna-Barbera—and featured two major early attractions, The Racer, a twin-tracked wooden roller coaster that helped revive American interest in coasters, and Enchanted Voyage, a whimsical ride through the world of Hanna-Barbera cartoons. In 1973, the park added the Flying Dutchman, Bayern Kurve, and Kenton's Cove Keelboat Canal, and in August it hosted the cast and crew of The Brady Bunch while they filmed the episode Cincinnati Kids. In 1974, Kings Island added the 100-acre Lion Country Safari, where several hundred live exotic animals, including lions, rhinos, and giraffes, could be viewed from an air-conditioned monorail, and the attraction continued to gain enhancements and additions in later years, including animals from North America and Asia. In 1975, the Coney Island area expanded with Troika and Giant Double Wheel, along with new landscaping and a patriotic paint scheme, and on October 24 Evel Knievel jumped 14 Greyhound buses in the parking lot before a television audience estimated at 55 million. In 1976, the indoor American Heritage Music Hall opened on International Street for the nation's bicentennial with the debut production We The People, featuring 16 performers, a nine-piece orchestra, and elaborate sets, while other bicentennial-themed changes included patriotic floral displays and the renaming of Flying Scooters to Flying Eagles.