Henry Auchey and Chester Albright founded PTC in 1904, selling carousels and "toboggan" rides (roller coasters). The company built approximately 75 carousels and about 150 roller coasters. A freelancing John A. Miller built the famous "Giant Coaster" at Paragon Park, Nantasket Beach, Mass. for PTC in 1917. This 98-foot-high, 4000-foot-long ride was moved to Adventure World in Mitchellville, Maryland in 1986.