The moment you step down from the airlines, you wont realize the mammoth size of the airport. Once you start walking through the terminal you go through many escalators and also an Intra Airport train service to go to a different terminal. Then you will come to know how huge this structure is. With a mono rail as a medium to travel in between different terminals, no wonder Changi airport is voted the best airport in the world multiple times.
The interiors are nicely decorated with modern art in some places and live garden around the pillars. It has wind and light deflecting ceilings for energy efficiency. The ground is totally covered with carpet unlike granite or costly marbles in India. Colours chosen blend with the atmosphere.
The airport is so huge that we hardly feel the presence of millions of people going through it. It has a very good viewing point of the aircraft parked. The entertainment zones are one of the best in the world with free internet, LAN connected games. Xbox, play stations and jamming area. There is a movie theater too !!Then there is this mall inside the terminal 1 which has the nest of the brands in the world. Right from Gucci to Prada to Mercedes, it has it all. There are many indoor gardens and ponds giving it the earthy feeling.
These are the things one experience as he steps down into Singapore. The kind of impression it leaves lasts for ever. It is truly a marvelous man made structure.