When the latest addition to the Changi Airport in Singapore is complete, the biodome-like structure of glass and steel will house a living rainforest across five floors, and the world’s tallest indoor waterfall. It will include gardens, walking trails, dining options and miles of retail options. Crews broke ground for the Jewel Changi Airport outside Terminal 1 last week. The new addition is set to for completion in 2018. Here’s a preview of the new space.