The RMS Queen Mary is a retired ocean liner that was built in the 1930s and served primarily on the North Atlantic route. Launched in 1934, it was known for its luxurious accommodations and speed, earning the nickname "The Grey Ghost" during World War II when it was used as a troopship. Today, the Queen Mary is permanently docked in Long Beach, California, where it operates as a hotel and museum. Visitors can explore its historic decks, learn about its storied past, and experience the grandeur of this iconic vessel.