The Dunsmuir House and Gardens (also known by the name The Dunsmuir-Hellman Historic Estate and previously known as Oakvale Park) is located in Oakland, California on a 50-acre (200,000 m2) site.

Dunsmuir, who came to the San Francisco Bay Area in 1878 to manage the family business, intended the house to be a wedding gift for his new bride but didn't get to live in it with her as he fell ill and died while on his honeymoon in New York.

During this time additions included the swimming pool and Dinkelspiel House and a good deal of landscape development on the northern end of the estate.

In June 1989, the non-profit organization took over most of the administrative duties and dubbed the grounds the Dunsmuir House and Gardens with its primary function to be as an educational, historical, cultural, and horticultural resource.

The 37-room mansion is 16,224 square feet and features 10 fireplaces, a Tiffany-style dome, wood paneled public rooms and inlaid parquet floors.