Which company opened an amusement park in 1976 which had a roller coaster dismantled in 1988?
Whizzer (roller coaster):  Manufactured by Anton Schwarzkopf of Germany, the two rides were the last “Speedracer” models ever built. Whizzer (roller coaster):  The California Whizzer was dismantled in 1988 while the Illinois Whizzer remains in operation, as one of only two Speedracers still in existence worldwide (the other operating as Broca (formerly known as Zambezi Zinger) at Parque Nacional Del Café in Montenegro, Colombia). Six Flags Great America: Six Flags Great America is a Six Flags amusement park located at Gurnee, Illinois, in the Chicago metropolitan area. Six Flags Great America:  It first opened in 1976 as Marriott's Great America.
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