The most "common" or busiest airport in Switzerland is Zurich Airport (ZRH), also known as Kloten Airport. It serves as the primary international gateway to the country and is the main hub for SWISS International Air Lines. In a typical year, Zurich handles over 30 million passengers, nearly double the traffic of the second busiest airport, Geneva (GVA). Zurich Airport is famous for its efficiency and is consistently ranked as one of the best airports in the world; it features a massive shopping complex called "The Circle" and an underground automated people mover called the "Skymetro" that connects the terminals. It is also uniquely integrated with the Swiss Federal Railways (SBB), allowing passengers to walk directly from their flight onto a train that can take them to almost any major city in the country. While Geneva is a major hub for low-cost carriers like EasyJet and Basel (MLH/BSL) serves the tri-national border area, Zurich remains the undisputed heart of Swiss aviation and global connectivity.