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WASHINGTON • Houston's Astrodome stadium, New York's old Pan Am Worldport Terminal at Kennedy Airport and Montana's one-room schoolhouses are joining a list of the nation's most endangered historic places.

On Wednesday, the National Trust for Historic Preservation released its listing of America's 11 Most Endangered Historic Places. It includes sites from Maine to Alaska.

The Astrodome was the world's first domed, air-conditioned stadium and was once called the "eighth wonder of the world." On Wednesday, a county board recommended converting the Astrodome into a giant convention center and exhibition space.

At New York's JFK Airport, the flying-saucer-shaped Worldport Terminal helped usher in the jet age in 1960 but has been vacated by Delta Air Lines and faces demolition.

A look at these two places, plus all the others on the list, through photos: