MMMmmm I guess the location has to do more with what you have in mind, and the sort of image that you think the model want to convey... :think:
Maybe it would be helpful if you describe more on that...
Fort Caning Park, Esplanade Park, Sambawang Park, and all the parks near the reservoirs. I suggest you spend sometime to go to all these spots on yourself first, and pick the one that you like.