Gardens in the Bay is amazing. If you are ever in Singapore this is a must see. There are some things you pay for (the two giant glasshouses, and the skywalk) but the rest is free to walk around. The 15 minute laser light show every night is also free and not to be missed.
The giant "trees" are a living sculpture.
Pitcher plants in one of the giant domes.
Choosing six photos was really quite hard. I have many others.