An airport consists of passenger terminal buildings with facilities for passengers, aircraft movement areas like runways and taxiways, and aircraft parking areas. The world's first airport was built in London in 1928. International airports typically have customs and immigration facilities to handle international flights. Key components of airports include runways, terminal buildings, aircraft parking areas, taxiways, control towers, and parking facilities. Changi Airport in Singapore is expanding with a new glass dome structure called Jewel Changi Airport that will include indoor gardens, waterfalls, and retail/dining space.