Provincetown Harbor is a large natural harbor located in the town of Provincetown, Massachusetts. The harbor is mostly 30 to 90 feet (27 m) deep and stretches roughly one mile from northwest to southeast and two miles (3 km) from northeast to southwest, i.e., one large, deep bowl with no dredged channel necessary for boats to enter and exit...

Roughly a dozen fishing trawlers (locally known as "draggers"), ferries to Boston and Plymouth, Massachusetts, several different sportfishing boats, boat rentals, and other commercial boats also use the harbor today. Wikipedia