GLORIOUS ROOM TO ROAM - This original duplex apartment is a rare opportunity at the Grinnell, one of the Crown Jewels of the Audubon Park Historic District on upper Riverside Drive. The 8+-room duplex, entered from a first-floor lobby (no waiting for an elevator), includes a side-by-side living room and library with French doors, paneled dining room, three bedrooms, two full baths, as well as generous foyers downstairs and up, and a unique winding stairway. Prewar detail includes original oak floors, 10-foot ceilings, and mirrored mahogany doors in the upstairs bedrooms and bath. A large kitchen features a slate floor, six-burner Viking stove, Bosch dishwasher, restored original oak cabinetry, and a full-size pantry. The two spacious upstairs bedrooms are separated from public areas by a gallery and include leaded glass transoms, ideal for cross ventilation. The downstairs bedroom has a full bath and can also be used as a guest room, home theater, or office.