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 six major theme parks and 25 roller coasters [6 wooden, 17 steel]. The region also represents approximately 3% of ACE's total membership with over 200 regional members as of February 2002. Below are the region's scream machines: ACME Gravity Powered Roller Ride Six Flags St. Louis Eureka, Mo. 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. BuzzSaw Falls Silver Dollar City Branson, Mo. Diamond Mine Run Magic Springs Hot Springs, Ark. Fire-in-the-Hole Silver Dollar 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. Orient Express Worlds of Fun Kansas City, Mo. Ozark Wildcat+ Celebration City Branson, Mo. Python Pit Jeepers! Olathe, Kan. River King Mine Six Flags St. Louis Eureka, Mo. Roller Coaster* Joyland Wichita, Kan. Runaway Ore Cart Silver Dollar City Branson, Mo. Screamin' Eagle Six Flags St. Louis Eureka, Mo. ThuNderaTion Silver Dollar City Branson, Mo. Thunderbolt+ Celebration City Branson, 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. * an ACE Coaster Classic + scheduled to open in 2003