 By 1945, Rocky Glen Park's popularity was on the upswing when Sterling added the Million Dollar Coaster, a 96-foot-tall, 4700-foot-long, out-and-back roller coaster that became the park's new signature attraction.Despite its name, the ride cost Sterling only $100,000 to build.Shoehorned between Glen Lake and the tracks of the Lackawanna and Wyoming Valley Railroad, it was one of the world's largest roller coasters at the time.