Dutch firm UNStudio has unveiled plans for a "user-oriented" extension to its Kutaisi International Airport terminal in Georgia, featuring a rooftop plaza. The Ben van Berkel-led firm completed the terminal building in 2013. Just four years later, the Amsterdam-based studio was asked to design a large extension, to cater to the airport's rapidly growing number of passengers. Passengers using the low-cost-airline airport increased from 12,915 per year in 2012 to more than 300,000 in 2016. It is expected to reach a capacity of close to 1,000,000 passengers by 2020.