first roller coaster opened first roller coaster opened first roller coaster opened first roller coaster opened first roller coaster opened this American first roller coaster opened one of the earliest roller coasters in the U.S. អានបន្ថែមនៅ history.com first roller coaster opened first roller coaster barely faster than a brisk power-walk The History Channel first roller coaster opened America's first roller coasters first roller coaster opened History.com The First Roller Coaster in America Opens the roller coaster,