As this month's 50th anniversary of the 1964 New York World's Fair approaches, a debate has emerged about what to do with some of the fair's most famous structures.

Three towers topped by flying-saucer-like platforms, and a pavilion of pillars once called the "Tent of Tomorrow" still sit as abandoned relics in the middle of Queens' Flushing Meadows Corona Park.

A group of preservationists is fighting to save them, but others see them as annoying eyesores that should be torn down. Neither option would come cheap: an estimated $14 million for demolition and up to $72 million for renovation.

Among the ideas are to convert the towers once again into observation decks or an elevated garden, with the open-air pavilion below turned into a concert performance space.