The Brooklyn-Battery Tunnel was new in 1950, when Alexander Leydenfrost drew this cutaway. At 9,117 feet, it is the longest continuous underwater tunnel in North America, according to Wikipedia.
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Source: Popular Mechanics May 1950
By Lee Wallender
Deception, influence, fakes, illusions, themed environments, simulations, secret places, secret infrastructure, imagined places, dreamscapes, movie sets and props, evasions, camouflage, studio backlots, miniatures.