Once Japan’s main Pacific naval base during WWII, Chuuk Lagoon now lies silent beneath turquoise waters—an underwater graveyard of over 60 sunken ships and 250 aircraft. Divers report shadowy figures drifting through the wrecks, glowing orbs, and sudden cold spots despite tropical waters. Many believe the spirits of sailors lost during Operation Hailstone in 1944 still patrol their rusted steel tombs, earning the site its reputation as the “Ghost Fleet of the Pacific.”