Airport is a huge complex of runways and buildings for the landing, take off and maintenance of civil aircraft, with facilities for passengers. Airport construction involves plenty of money.
Here are the 10 most expensive airports ever built in the world.
This airport is undergoing a $2.3 billion terminal construction. The project is likely to be finished by 2017. The airport gets around 55 million passengers every year.
Built over a period of five years, this airport covers 25,000 acres of space. It was opened in 1998 and has different terminals for standard and low-cost air travel.