Crews in Italy are busy right now trying to flip the shipwrecked Costa Concordia upright, a year and a half after it ran aground and capsized, ending up perched on two underwater mountain peaks. The salvage process is incredibly expensive and complex, and if it goes awry, there’s no good backup plan. Why so difficult? The Costa Concordia is simply enormous. It’s bigger than the Titanic. To compare the two ill-fated ships, we pulled together stats from old press releases from Fincantierei, which built the cruise liner, as well as sites dedicated to the histories of the famed SS United States and Queen Mary, also worthy of Titanic comparisons.