The society operates the Thankful Arnold House Museum and the Wilhelmina Ann Arnold Barnhart Memorial Garden in the scenic lower Connecticut River Valley village of Haddam, Connecticut. Visitors hear the story of the Widow Arnold and that of her daughter and granddaughter. Representative of their time, these three generations of women were head of the household in the home that was built between 1794 and 1810. The house is open year round. The museum is a proud member of the Connecticut Women's Heritage Trail.