Time Out says
The ICA’s seasonal (May-October) annex has transformed an abandoned space on the Boston Harbor Shipyard and Marina into a venue for large-scale, immersive art. Each summer sees new installations and public programming. There’s also a gallery covering the history of the shipyard and East Boston. While Watershed admission is free, combine your visit with the main ICA and a cool trip across the Harbor on a Water Shuttle is included in ICA admission.