 It carried more than one million passengers in the first three years of its existence (it was dismantled in 1957).The post-World War II increase in the use of the automobile contributed to the gradual decline in the use of the railroad, and the few remaining trolley parks were slowly fading into the sunset.Sterling's/Rocky Glen was no exception (its plight exacerbated by the decline in the coal industry at the same time), and by 1970, Ben Sterling opted to sell the park to an Atlanta, Georgia-based entertainment company, National Recreation Service.