Singapore's Changi Airport was named the World's Best Airport in 2016 by World Airport Awards. This is the fourth year that Changi Airport, one of the largest transportation hubs in Southeast Asia,was awarded the top spot by Skytrax,a global airline review and rating agency.

For many of the millions of passengers that fly through and out of Changi, the title is not a surprise. The airport is known for its continual physical upgrades to its existing terminals and for building new facilities to maintain its reputation in airport service quality. It also boasts numerous shopping and dining options, a rooftop cactus garden, two 24-hour movie theaters, and a Balinese-themed outdoor pool, according to Fortune.

"To be named the World's Best Airport by Skytrax for the fourth year running is a significant achievement for Changi Airport and a clear affirmation that we continue to hit the right notes in our pursuit of service excellence," saidLee Seow Hiang, CEO of Changi Airport Group. "We do not take this recognition for granted; it is the extraordinary effort and commitment of the entire airport community that drives Changi’s success."

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A new, mixed-use complex is scheduled to open at Changi in 2019. Featuring a glass and steel facade, the building will house one of the largest indoor collections of plants in Singapore, a five-story garden filled with thousands of trees, and a 130-foot high indoor waterfall, reported CNBC.

Asia's airports performed well in the rankings.South Korea's Incheon International Airport came in second place, a spot it has held since 2013. Three of Japan's airports—Tokyo International Airport Haneda, Central Japan International Airport and and Kansai International Airport—made the top 10. Doha, Qatar's Hamad International Airport 10th place ranking also marks the first time a Middle East airport made the top 10.

Click through the slideshow above to see the top 20 airports recognized by the World Airport Awards. The World Airport Awards are based on a Skytrax survey of 13.25 million travelers across 106 nationalities, and included 550 airports worldwide.

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Circa 1936: Air hostess Daphne Kearley of Golders Green tending to the crew of the new luxury air service from Croydon, England to Paris, operated by Air Dispatch. (Ward/Getty Images)