This image created using the Continuous Bathymetry and Elevation Models of the Massachusetts Coastal Zone and Continental Shelf, shows the entrance to the Buzzards Bay entrance to the Cape Cod Canal.
Brian Andrews, Woods Hole Coastal and Marine Science Center. Public domain.
<a rel="nofollow" class="external text" href="https://www.usgs.gov/media/images/buzzards-bay-entrance-cape-cod-canal">U.S. Geological Survey</a>