Boston

Charles River Bridge from Back Bay, Boston: looking north across the Charles river.

This area was originally an open water body subject to the tides. As an inland, tidal sea, Back Bay was shallow and silting up from shoreline development. Because of the erosion the area was easily transformed by filling or reclamation. The hills of Boston were taken down to fill Back bay and create the foundations for the suburban expansion of the city core from one side to the west or opposite side of Boston Common.