If you have an overnight layover, what happens depends largely on the airline and your budget. Many international airlines (like Emirates, Qatar, and Turkish Airlines) offer "Stopover Programs" where they provide a complimentary or discounted hotel stay, meals, and transfers if your layover is between 8 and 24 hours and no shorter connection was available. If the airline does not provide a room, you can book an airport sleeping pod (like Minute Suites) for a few hours of rest or use an airport lounge if you have access. Some travelers choose to leave the airport to explore the city, but you must check visa requirements and ensure you have at least 10 hours to make the round trip feasible. If you stay in the airport, remember that many shops and restaurants close late at night, so keep a "survival kit" with snacks and a portable charger.