Enjoy a 45 minute guided tour for two people. The Marine Mammal Center is a nonprofit veterinary research hospital and educational center dedicated to the rescue and rehabilitation of ill and injured marine mammals primarily elephant seals, harbor seals, and California sea lions. Since 1975, weve been headquartered in Sausalito, CA in the Marin Headlands within the Golden Gate National Parks, and have rescued and treated more than 20,000 marine mammals. Expires 11/30/2019.