An airport is an aerodrome with extended facilities, mostly for commercial air transport. And often have facilities to store and maintain aircraft and a control tower. An airport consists of a landing area, which comprises an aerially accessible open space including at least one operationally active surface such as a runway for a plane to take off or a helipad and often includes adjacent utility buildings such as control towers, hangars and terminals. Larger airports may have aprons, taxiway bridges, air traffic control centers, passenger facilities such as restaurants and lounges, and emergency services. In some countries, the US in particular, they also typically have one or more fixed-base operators, serving general aviation. An airport solely serving helicopters is called a heliport. An airport for use by seaplanes and amphibious aircraft is called a seaplane base. Such a base typically includes a stretch of open water for takeoffs and landings, and seaplane docks for tying-up. An international airport has additional facilities for customs and passport control as well as incorporating all of the aforementioned elements. Such airports rank among the most complex and largest of all built typologies with 15 of the top 50 buildings by floor area being airport terminals Designation and Naming Airports are uniquely represented by their IATA code and ICAO code. Most airport names include the location. Many names are to honor a public figure, commonly a politician, a cultural leader or a prominent figure in aviation history of the region sometimes even famous writers and explorers Some airports have unofficial names, possibly so widely circulated that its official name is little used or even known. Some airport names include the word "International" to indicate their ability to handle international air traffic. This includes some airports that do not have scheduled international airline services