Grab Your Suit! The Pool Is Almost Open McCarren pool, opened in the summer of 1936, on the Greenpoint-Williamsburg border in Brooklyn, is now being reopened after 28 years of being closed. The pool complex, which sits in McCarren Park, has undergone a $50 million restoration, and is set to reopen ayyy the end of June. and the enormous rectangular pool has been turned into a giant U, with the placement of a concrete beach at its center. Grab your suit!