Winnekenni Castle
- Includes events, directions, history, functions and theatre workshop information.
- http://www.winnekenni.com/

John Greenleaf Whittier Homestead
- Includes history, events, bibliography and multimedia section.
- http://www.johngreenleafwhittier.com/

Winnekenni Castle Foundation, Inc.
- Contact information for the castle.
- http://www.museumsusa.org/data/museums/MA/95904.htm

Haverhill Historical Society
- Provides information about the Buttonwoods Museum. Includes tours, programs, volunteer opportunities, calendar and contact information.
- http://www.haverhillhistory.org/