The Red Mill Shop, located on the first floor of the widely-recognized and beloved old mill, features a variety of gifts and historical reproductions. The upper floors are devoted to Hunterdon County history. Numerous items from the Museum's 40,000 piece collection are on display. In 1952 a group composed of artists and community leaders acquired the stone gristmill for use as a nonprofit cultural center. The building was extensively rehabilitated and now is the home of the Hunterdon Art Center.
Exhibitions feature local, national and international artists.
The Center's Stone Mill Shop offers pottery, books and seasonal gifts. The museum sites are connected by a picturesque iron bridge constructed in 1870. The bridge contains walking paths that are kept separate from the traffic by heavy wrought iron rails. Even though this bridge is part of Main Street, serious trout fishermen are often glimpsed angling from the bridges walking paths. Center- is the old downtown business district.