Walnut Grove, California
Walnut Grove is a beautifully preserved very small 19th and early 20th century town in the Sacramento River Delta. Walnut Grove had many Japanese and Chinese residents in the early 1900s. These people mostly lived in separate Chinese and Japanese sections of tightly packed homes on the eastern side of the Sacramento River. The former Japanese section is largely intact although there are few Japanese residents left. The Japanese residents of Walnut Grove were forcefully removed during WWII to internment camps and many did not return after the war was over. The Southern Chinese section of Walnut Grove was destroyed by fire in the 30s but was largely rebuilt before the Chinese residents began leaving in the 1940s and 50s.
Walnut Grove has not grown much since the 1950s and the central historic district on the eastside of the Sacramento River has been largely untouched. A half mile north of Walnut Grove is the small community of Locke which was built by Chinese in the early 1900s. 10 miles Southwest of Walnut Grove is Isleton which has a wonderful collection of 19th and early 20th century buildings. All three are very well preserved and well worth visiting for anyone interested in California history. The National Park Service website has a page on Walnut Grove though there are no National Parks or Monuments in the area.