London Heathrow (LHR) is most famous for being the world's busiest international airport by passenger traffic and the primary global hub for civil aviation. It is renowned for its "Terminal 5," the flagship home of British Airways, and its high-density operations where two runways handle over 1,300 flights per day. Historically, Heathrow is famous as the primary base for the Concorde during its supersonic era. In 2026, it is also noted for its "Pod Parking" (driverless shuttles) and its massive retail presence, often referred to as a "shopping mall with runways" due to the high concentration of luxury brands. Furthermore, Heathrow is famous for its geographic "slot" system, where take-off and landing slots are so valuable they are traded between airlines for tens of millions of dollars. It serves as the quintessential "gateway to Europe," connecting over 180 destinations across nearly 100 different countries.