The 747 hotel in Sweden had a room in the cockpit.: Edwin Remsberg / VWPics/Universal Images Group via Getty ImagesA handful of retired Boeing 747 airliners have been given a second life.An ex-passenger 747 was turned into a hotel in Sweden, while another is a dive site in Bahrain.The superjumbo is a rarity these days as airlines replace them with newer twin-engine widebodies.You don't need a plane ticket to experience one of the most iconic — a…