The Cathedral of St. John the Divine in Manhattan is the World’s Largest Gothic Cathedral. Except, of course, that it is a fake; first by the simple fact of being built in Manhattan, at the turn of the century. But the stone work is re-inforced with steel which is expanding with rust. Someday it will destroy the stone. The Cathedral is in Morningside Heights overlooking a panoramic view of Harlem which is separated by a high fence.