The Rotch-Jones-Duff House is the grandest surviving example of the mansions built by New Bedford's whaling merchants in the first half of the 19th century. Designed by architect Richard Upjohn in 1834 in the Greek Revival style, it was home to three successive families — Rotch, Jones, and Duff — each of whom added their mark to the property over 150 years. Herman Melville noted that New Bedford whalers lived in mansions while the workers lived in poverty; this house is the evidence for his observation.
The interior is preserved with period furnishings and original mahogany woodwork and opens to the public with guided tours. The formal gardens outside are the real draw for many visitors: multiple garden zones include a boxwood parterre, a cutting garden, and a woodland walk that are particularly beautiful in spring and summer. The museum also runs educational programs on topics ranging from botany to whaling history. The house is at 396 County Street, a 15-minute walk south of the historic district.