BY APPOINTMENT OPEN HOUSE: Get ready to enjoy the best of coop living in this stunning 10th floor apartment nestled in The Blue Building, in the Spuyten Duyvil section of Riverdale, Bronx.  Built in 1968-1969, this 13-story, 130-unit mid-rise full-service coop features a modernist design with a brick and glass facade, offering panoramic views of the city, Palisades, Hudson River, and Harle...