Rosemary Pool Rosemary St & Hillside Ave, Needham Heights, MA02494 Maintained by Park and Recreation, Rosemary Pool is the perfect spot for residents to find relief from the heat during…More warmer months. Built into Rosemary Lake in 1972, this 300' x 70' structure contains several unique attributes. Sand can be found on both ends of the pool with lap lanes on the right side and a diving section on the left. Sections of the pool have been designated for young swimmers, and there is a separate path into the water that is handicap equipped. The pool is open daily during the summer months.