Yes, you can absolutely leave Dubai International Airport (DXB) during a layover, provided you have the necessary visa and enough time to return for your connecting flight. Citizens of many countries, including the US, UK, and much of the EU, receive a free "visa on arrival" which allows them to exit the airport immediately after passing through immigration. If you are from a country that requires a pre-arranged visa, Emirates and other carriers often offer a specific "96-hour transit visa" for a small fee. It is generally recommended that you have a layover of at least 6 to 8 hours to make exiting worthwhile, as the airport is massive and security/immigration queues can take time. Once outside, the Dubai Metro connects the airport directly to major landmarks like the Burj Khalifa and Dubai Mall in about 25–30 minutes. If you are flying Emirates with a layover between 8 and 26 hours, you might even be eligible for the "Dubai Connect" service, which provides complimentary hotel accommodation, transport, and meals, often allowing you to explore the city with even more convenience before your next flight.