Kittery is the southern-most town in Maine, about halfway between Boston and Portland. It is just across the Piscataqua River from Portsmouth, New Hampshire. Find us via I-95 (Maine Turnpike) or US Route 1 (State Road or Kittery Mall Road).
The Museum is along US Route 1, just north of the Kittery Traffic Circle. It's easily seen, right beside the Town Hall at 200 Rogers Road.
And yes, the outlet malls are just up the road a piece.