Aquatic Park is a public park in Berkeley, California, United States, located just east of the Eastshore Freeway (Interstate 80) between Ashby and University Avenues. The Works Progress Administration created the park in the 1930s simultaneously with the nearby Berkeley Yacht Harbor. Its centerpiece is an artificial mile-long lagoon that was cut off from San Francisco Bay by the creation of a causeway for the Eastshore Highway, during the construction of the approaches to the San Francisco – Oakland Bay Bridge, also in the 1930s. The lagoon still communicates with the Bay through culverts under the freeway (one in line with Ashby Avenue, the other in line with Grayson Street).