SS Palo Alto was a concrete ship built as a tanker at the end of World War I. Completed too late to see war service, she was mothballed until 1929, when she was intentionally grounded off Seacliff State Beach in the Monterey Bay, becoming part of a pleasure pier entertainment complex. Palo Alto was damaged by the sea, leading her to be stripped and used only as a fishing pier. Subsequent decades have seen her be further broken by the sea, but large sections of her wreck remain somewhat intact. History SS Palo Alto was built by the San Francisco Shipbuilding Company at the U.S. Naval Shipyard in Oakland, California. She was launched on 29 May 1919, too late to see service in the war. Her sister ship was the . Palo Alto was mothballed in Oakland until 1929, when she was bought by the Seacliff Amusement Corporation and towed to Seacliff State Beach in Aptos, California. A pier was built leading to the ship in 1930, and she was sunk in a few feet in the water so that her keel rested on the bottom. There she was refitted as an amusement ship, with amenities including a dance floor, a swimming pool and a café.The company went bankrupt two years later during the Great Depression, and the ship cracked at the midsection during a winter storm. The State of California purchased the ship, and she was stripped of her fittings and left as a fishing pier. She was a popular site for recreational fishing, but eventually she deteriorated to the point where she was unsafe for this purpose, and she was closed to the public in 1950. Following an attempt at restoration in the 1980s, she reopened for fishing for a few years, then closed again. The fishing pier opened to foot traffic once again in the summer of 2016, but later closed for repairs. Nicknamed the "Cement Ship", Palo Alto serves as an artificial reef for marine life. Pelicans and other seabirds perch on the wreck, sea perch and other fish feed on algae that grow in the shelter of the wreck, and sea lions and other marine mammals visit the wreck to feed on the fish. In the spring of 2005, oil found on wildlife nearly two years earlier, killing dozens of seabirds, was traced back to the ship, whose fuel tanks had cracked and were leaking