South Bay is a 10-acre (40,000 m²) site in Boston, Massachusetts between Chinatown and the Leather District. It is roughly bounded by Kneeland Street, Hudson Street, the Massachusetts Turnpike mainline, and the Interstate 93 mainline. Currently owned by the Massachusetts Turnpike Authority (MTA), the site is being put up for development. The developer with the winning bid could put up an office tower as high as 600 feet, but the site is being envisioned as a mixed-use project anchored by office towers, that would include parkland, retail, hotel, and residential space.