A tiny white wooden Baptist church on the edge of Juilliard Park, the Church of One Tree was built in 1873 entirely from boards milled from one enormous redwood tree felled near Guerneville. It is now a city-owned event space, not a working church, and is normally locked except for weddings and private functions — but it is photogenic from the outside, and the small park around it is a pleasant lunch spot.
The building is on the National Register of Historic Places and a few minutes' walk from the Luther Burbank Home and Gardens.