The Queen Mary was built by the John Brown shipyard in Clyebank, Scotland and owned by the Cunard White Star Line (later just Cunard - as it remains today). She is more than double the size of the infamous Titanic at 81,237 GRT and 1,019.5 feet long. You could actually nestle Titanic in Queen Mary's bow. She could also hold about 3,200 people all together - that's 2,000 passengers and 1,200 crew.
The ship was named after Mary of Teck, the wife of Great Britain's King George V (the current queen's grandfather). She was heralded as the most luxurious liner ever built and operated between Southampton, England and New York City. Her maiden voyage began on May 27, 1936 and she ultimately took the transatlantic speed record (called the Blue Riband) away from her chief rival - France's Normandie.
When World War II began, however, the ship was pressed into service as a troop transport. Between 1940 and 1946 she carried more than 800,000 soldiers and sailed more than 600,000 miles - playing a role in virtually every major Allied campaign of the war. Adolf Hitler actually put up a $250,000 bounty and offered the Iron Cross with Oak Leaves to any U-Boat captain that could find and sink her. At one point in 1943, the Queen Mary transported 16,683 people at one time - a world record that still stands today.
The ship was restored to passenger service in July 1947 and spent the next 20 years as the "Grand Old Lady of the Sea." Anyone who was anyone sailed aboard either the Queen Mary or her younger - and larger - sister the Queen Elizabeth.
But the rise of affordable transatlantic air travel ended her career. By 1967 the loss of passengers and income forced the Cunard Line to put the Queen Mary up for auction.
The liner's staterooms are a part of the hotel nowadays, but - space permitting - you can see one on Behind-the-Scenes and Twilight Historical Tours. Many of them are similar to the photo above, but no two cabins aboard the Queen Mary are exactly alike. They are each unique and special in their own right.
Also on display towards the bottom of the ship is one of the Queen Mary's four propellers. Each of these weigh 32 tons, yet turned three times a second when the ship was at full steam (that's 180 RPM!). The other three were removed and put on display elsewhere.