A Landing Deck in Midtown Manhattan, New York City, from LIFE Magazine, 1946

"It is an airport built 200 feet above street level right over 144 square blocks of Manhattan’s crowded, valuable West Side from 24th to 71st Streets and from Ninth Avenue to the river. On the top 990-acre deck, which is 12,000 feet long by 3,600 feet wide and is roughly as big as Central Park, are three parallel runways to handle plane traffic. […] The man who dreamed it up is one of the most successful and hard-boiled real-estate men in New York City – William Zeckendorf, vice president of the big New York real-estate firm of Webb and Knapp. He estimates the cost of his transportation center at $3 billion, $500,000,000 for the land and $2,500,000,000 for construction and financing. This, he thinks, can be paid off by rental income within 55 years after the project is completed." – according to the article of LIFE Magazine.

More: These Are the Floating Airports of Our Dreams

A Landing Deck in Midtown Manhattan, New York City, from LIFE Magazine, 1946

"It is an airport built 200 feet above street level right over 144 square blocks of Manhattan’s crowded, valuable West Side from 24th to 71st Streets and from Ninth Avenue to the river. On the top 990-acre deck, which is 12,000 feet long by 3,600 feet wide and is roughly as big as Central Park, are three parallel runways to handle plane traffic. […] The man who dreamed it up is one of the most successful and hard-boiled real-estate men in New York City – William Zeckendorf, vice president of the big New York real-estate firm of Webb and Knapp. He estimates the cost of his transportation center at $3 billion, $500,000,000 for the land and $2,500,000,000 for construction and financing. This, he thinks, can be paid off by rental income within 55 years after the project is completed." – according to the article of LIFE Magazine.

More: These Are the Floating Airports of Our Dreams