The futuristic-looking structures that stand in Flushing Meadows Corona Park actually date back to the early 1960s, when they were built for the New York World's Fair in 1964.

A dream team of architects, including Philip Johnson, Richard Foster, and Lev Zetlin, designed the complex, which includes observation towers, a theater, and a tent that once had a cable suspension roof.

While the fairgrounds have been empty for decades, a massive restoration of the complex that will make it suitable for visitors is underway, and is set to be completed by 2019.