The communities of Rio Del Mar and Seacliff are located in the unincorporated area of Aptos in the center of Santa Cruz County. Rio Del Mar is the site of Rio Del Mar State Beach, a more developed beachside area with restaurants, a bar, nearby parking and numerous vacation rentals.
Seacliff is primarily a residential area, characterized by few sidewalks and dense housing. It is the entryway to Seacliff State Beach, famous for its fishing pier and cement ship, the Palo Alto, a concrete freighter built in 1917 at the U.S. Naval Shipyard in Oakland and docked at Seacliff State Beach since 1929.