Newbury Park contains many ancient burial sites, most near the Santa Monica Mountains in the southern portion of the community. Many burial items have been discovered in the area, most notably by Rancho Sierra Vista in southern Newbury Park. Satwiwa, which is Chumash for the bluffs, was the name of a nearby village by the Big Sycamore Canyon. The canyon was a popular trading route for the Chumash- and Tongva people, connecting the Conejo Valley to Mugu Lagoon through the Santa Monica Mountains. Unlike Satwiwa, which is now protected as a part of the Santa Monica Mountains National Recreation Area, the two other Chumash villages once located within Newbury Park are located on private lands by Ventu Park Road. These are known as CA-Ven-65, CA-Ven-261, and CA-Ven-260 near the Fieldhouse in Newbury Park. At CA-Ven-261 is an ancient Chumash burial site as suggested by a village of long duration.