The Boeing 777X is one of the most high-profile aircraft development programs of the past decade. The aircraft’s design is incredibly innovative, featuring folding wingtips, a wider cabin, larger windows, and a quieter, more refined long-haul experience. One of the aircraft’s most fascinating features is something that most passengers may never even notice. There is a hidden space above the main cabin that gives the aircraft a kind of secret upper deck. No, this is not a Boeing 747-style second floor made for travelers, and it is not any kind of flashy onboard lounge. Instead, it is a tightly engineered overhead rest area built into the crown of the jet, ultimately designed to keep pilots rested, connected, and ready on the world’s longest flights.