This artificially created lagoon is located in the central coast of Chile and is part of San Alfonso del Mar resort. It is in the Guinness World Records as being the biggest pool in the world. It is 1,000-meter long, 19-acre outdoor pool that utilizes a technology developed by the Chilean company Crystal Lagoons, which uses water pumped from the Pacific Ocean, that is then filtered and treated for supply to the pool.
Source: Email from someone.
