I was pleasantly surprise to see an Orchid Garden with full bloom right in the middle of the airport. Yes, it's full bloom with multi coloured orchids with a Koi Pond to go along with it.
Oh yes, you have almost everyone who was inside taking photographs, people posing etc.
Here's a snippet of information about Orchids.
p/s Changi Airport, Singapore has 4 terminals. Terminal 1 and 2 are the usual terminal with full service facility like all the pictures you seen so far. There's a Budget Terminal as well, which is for the low cost carriers. Terminal 3 is currenly being built and I think it's almost ready.