Which canal separates Cape Cod from mainland Massachusetts?

The Cape Cod Canal separates Cape Cod from mainland Massachusetts.

The artificial waterway cuts across the narrow base of the Cape in Barnstable County, linking Cape Cod Bay to Buzzards Bay. By providing a shortcut around the peninsula, it saves vessels a longer trip around Cape Cod and is part of the Atlantic Intracoastal Waterway.

Construction of the modern canal began in 1909, and limited service opened in 1914. The United States government purchased it in 1928 and later widened and deepened the channel. Today, the U.S. Army Corps of Engineers maintains it as a free public waterway with no locks.

The canal is about 7.4 miles long and is crossed by the Bourne Bridge, Sagamore Bridge, and a railroad bridge. Its currents reverse roughly every six hours with the tides, which can make navigation challenging. The Erie, Rideau, and Caledonian canals are unrelated waterways in other regions.