Rancho Palos Verdes (RPV) is a city in Los Angeles County, California that was incorporated on September 7, 1973. The population was 41,145 at the 2000 census. Rancho Palos Verdes is an affluent suburb of Los Angeles. Sitting atop the bluffs of the Palos Verdes Peninsula, it is known for expansive views of the Pacific Ocean. The history of Rancho Palos Verdes dates back to the Spanish explorers and the establishment of the first Spanish rancho land grant in California. Its most notable geographic features are the Palos Verdes Hills and cliffs with grand vistas of the Pacific Ocean, with views of Santa Catalina Island. Its most notorious geographic feature is the continuous landslide at Portuguese Bend, which may have been caused in part by septic runoff from homes in Rancho Palos Verdes and its neighboring communities.