860–880 Lake Shore Drive Apartments, Glass and steel residential towers in Streeterville, Chicago, United States

860–880 Lake Shore Drive consists of two identical 26-story towers, 270 feet (82 m) tall, each built on a 3-by-5 grid of square bays 21 feet (6.4 m) on a side. The south tower at 860 runs west–east and the north tower at 880 runs north–south, their glass facades divided by I-beam mullions and spandrel panels. A ground-story arcade and glass-walled lobbies sit below the apartments.

Ludwig Mies van der Rohe designed these towers in 1949, introducing a new architectural approach to North America that featured steel and glass as primary materials. The project demonstrated that this design philosophy could work effectively in residential buildings.

The towers are nicknamed the "Glass House Apartments." Mies defended the non-structural I-beam mullions on the facades in a 1960 interview, saying structure is "like logic." The lobbies and travertine plaza linking the two towers were restored from 2008 by Krueck & Sexton Architects.

The two towers sit directly on the lakefront with easy access to nearby beaches and parks. Visitors should note that the buildings are primarily residential, though public areas are visible from outside.

The tower facades display visible steel beams that do not actually carry the building's weight but serve to emphasize the design philosophy. This deliberate expression of structure was Mies' way of showcasing how buildings are honestly constructed.