Bigelow House Museum is one of Olympia's best small historical stops, a preserved 1850s home that brings the city's territorial period down to domestic scale. The house belonged to Daniel and Ann Elizabeth Bigelow, early settlers whose lives overlapped with the legal, political, and social formation of Washington Territory.
The museum works best as a counterpoint to the grander Washington State Capitol. Instead of marble halls and state symbolism, you get rooms, furnishings, family papers, and the texture of everyday civic life in a young capital town. Check tour times before going, as access is more limited than at larger museums.