The best airport in the world is building a $1.7 billion indoor forest and waterfall

Jewel Changi Airport Devt.

The Rain Vortex.

For the fifth consecutive year, Singapore's Changi International has been named the best airport in the world by leading consumer aviation website Skytrax. The mega hub has long been praised by travelers for its beautiful architecture, efficient operation, and luxurious amenities.

Since 2014, Changi has taken extraordinary measures to maintain its place as the world's best airport. At the heart of its plan is a $1.7 billion mixed-use facility called the Jewel. The 1.4 million sq.-ft. complex features a series of forest-like gardens, an indoor waterfall, a hotel, as well as hundreds of dining and shop options.

"Not only will Jewel capture the hearts and minds of travelers and boost Singapore's appeal as a transit hub, it will enhance the Changi Airport experience for our passengers and visitors," Jewel Changi Airport Development CEO Jean Hung said in a statement.

Have a closer look at the Jewel Changi Airport.