A thrill ride called the “Aeroplane Glide” appears in a tax assesor’s photo at the Riverton Trolley Park, then owned by Riverton Realty Company, in 1924. Written on the back of is, “Consists of 6 cars, suspended by cables from steel masts, cars revolve about masts.” Photo courtesy of City of Portland Planning and Development. Item #99996 on MaineMemory.net.