Construction of Hong Kong International Airport began in 1991 on 12.5-square kilometers (4.85 square miles) of reclaimed land and took seven years to complete. An additional 6.5 square kilometers (2.5 square miles) is now being added to construct a third runway, scheduled for completion in 2024. Hong Kong is one of the world’s busiest passenger airports, handling upwards of 70 million people a year. 22.308047°, 113.918480° Source imagery: Planet / NASA / Google Timelapse | Daily Overview