One of my favourite places to visit in Singapore has to be Gardens by the Bay (http://www.gardensbythebay.com.sg) 
The super trees are a great way to know your getting close to the gardens. The artificial trees generate electricity from solar power and collect rain water. In side the gardens you'll find all sorts of flowers and greenery.
I highly recommend making sure to see the cloud forest conservatory. You can see all sorts of plants and flowers that change as the humidity reduces as you go up. 
At the top of the cloud forest you can see the iconic Marina Bay Sands hotel outside. I hope you enjoyed my brief story and pictures from Gardens by the Bay.