RMS Queen Mary, California
In 1936, the RMS Queen Mary sailed off on its maiden voyage as a cruise ship but it was eventually turned into a troop ship for WWII in 1939 and dubbed “The Grey Ghost.” Then it reverted back to a cruise ship in 1947 before docking in Long Beach in 1967. Today, the RMS Queen Mary is a hotel, but guests claim the ship is haunted by the ghosts of crew members and guests who died onboard.