The Whirlpool Aero Car or Spanish Aero Car is a cable car located in Niagara Falls, Ontario that transports passengers over a section of the Niagara River referred to as the Niagara Whirlpool. The system was designed by Spanish engineer Leonardo Torres Quevedo and has been upgraded several times since 1916 (in 1961, 1967 and 1984). The system uses one car that carries 35 standing passengers over a one-kilometre trip.