A short walk from the Petchaburi MRT station is the Makkasan rail link to Suvarnbhumi Airport. Take the steps below the station and you see this vast empty area. I’ve been here twice and never seen anyone else. It’s like a movie set waiting for a story.

Terminal 21 is a shopping mall themed like an airport with each floor taking on a certain destination. The middle is full of escalators, including a pair that traverse several floors in one go – not for those with a fear of heights.