The Dominguez Rancho Adobe is California Historical Landmark Number 152, and in 1976 was placed on the National Register of Historic Places by the United States Department of the Interior. The adobe of Manuel Dominguez, on the Spanish land grant of Rancho San Pedro (re-validated under Mexican rule), was completed in 1826. The home features 2-foot-thick (0.61 m) walls, heavy timbers and a flat, tarred roof. Much of the furniture is original to the Dominguez family.