Situated at the geographic center of the United States, the Heart of America Region consists of Arkansas, Kansas, Missouri and portions of southern Illinois. And, while the region may not be the largest, most populated, or coaster-infested region, it is unique and definitely has a character all its own. The region is home to a total of eight permanent amusement parks and 30 roller coasters [6 wooden, 24 steel]. The region also represents approximately 3% of ACE's total membership with nearly 200 regional members as of June 2004. Below are the region's scream machines: Arkansas Twister Magic Springs Hot Springs, Ark. Batman: The Ride Six Flags St. Louis Eureka, Mo. Big Bad John Magic Springs Hot Springs, Ark. Boomerang Worlds of Fun Kansas City, Mo. The Boss Six Flags St. Louis Eureka, Mo. Diamond Mine Run Magic Springs Hot Springs, Ark. Dragon Coaster+ All-Star Adventures Wichita, Kan. Fire-in-the-Hole Silver Dollar City Branson, Mo. Gauntlet Magic Springs Hot Springs, Ark. Grand Exposition Coaster+ Silver Dollar City Branson, Mo. Jack Rabbit Celebration City Branson, Mo. Mamba Worlds of Fun Kansas City, Mo. Mr. Freeze Six Flags St. Louis Eureka, Mo. Ninja Six Flags St. Louis Eureka, Mo. Ozark Wildcat Celebration City Branson, Mo. Patriot+ Worlds of Fun Kansas City, Mo. PowderKeg Silver Dollar City Branson, Mo. River King Mine Six Flags St. Louis Eureka, Mo. Roller Coaster* Joyland Wichita, Kan. Rockin' Roller Six Flags St. Louis Eureka, Mo. Screamin' Eagle Six Flags St. Louis Eureka, Mo. Spinning Dragons Worlds of Fun Kansas City, Mo. ThuNderaTion Silver Dollar City Branson, Mo. Thunderbolt Celebration City Branson, Mo. Tiger Terror Route 66 Park Joplin, Mo. Timber Wolf Worlds of Fun Kansas City, Mo. Twist 'n' Shout Magic Springs Hot Springs, Ark. Wacky Worm Worlds of Fun Kansas City, Mo. Wildfire Silver Dollar City Branson, Mo. X-Coaster+ Magic Springs Hot Springs, Ark. * an ACE Coaster Classic + opened or scheduled to open in 2005