As found on the Niagara Parks Commission page for this attraction.
Ride The Air - Whirlpool Aero Car
High above the racing Niagara River, you'll look eye to eye with birds soaring effortlessly on thermal updrafts rising from the gorge. Suspended in space you share their point of view. Far below the torrent of water abruptly changes direction, creating one of the world’s most mesmerizing natural phenomenon – The Niagara Whirlpool. Sometimes frightening and always unforgettable.
The aero car was designed by a Spanish engineer, Leonardo Torres Quevedo and has been in operation since 1916. The cable car is suspended from six sturdy cables and offers a wonderful view of the Niagara Whirlpool which is formed at the end of the rapids where the gorge turns abruptly counterclockwise and the river escapes through the narrowest channel in the gorge. Please note that this attraction is NOT wheelchair accessible
There is also a great review at Wikipedia - Spanish Aero Car
For my part, this is a great location to stop and view some spectacular views of the gorge, and the strata of erosion from the retreat of the Falls as they moved from Queenston (North of this location) to their current position over the last 10,000 years.
While the view here is great, at the scenic lookout found at the other end of the Spanish Aerocar lines affords an even better view of the Whirlpool. However, the Spanish Aero Car does not allow disembarkment at the other end.
According to the plaque at the site:
Leonardo Torres Quevedo (1852-1936) was an ingenious Spanish engineer. Among his creations were algebraic machines, remote control devices, dirigibles and the world's first computer.
The Niagara Spanish Aero Car was designed by Leonardo Torres Quevedo and represented a new type of aerial cable way that he called "Transbordador". Officially opened on August 8, 1916, it is the only one of its kind in existence.
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