PRIME PARK SLOPE! This sprawling co-op overlooks Prospect Park to the east and Manhattan and the harbor to the west. One of four Montrose Morris designs flanking Carroll Street, this magnificent 25-foot-wide mansion on the park houses five apartments. A gracious stair leads you to the top floor where rooms radiate off a center kitchen, creating an intriguing and flexible layout. The apartment has many notable architectural details: gabled ceilings, original floors, recessed-panel doors, historic windows, wood-burning fireplace -- and more. Private laundry is a welcome convenience. Two skylights, as well as two exposures, bathe the apartment in natural light. A secluded private deck offers both glorious views and a respite from busy life.