The Circle Line is Singapore’s newest train line which circles the business-shopping-recreational belt that is located within the southern half of Singapore.
The Circle Line Tour is ideal for those who want to sample a cross-section of what Singapore has to offer. It is also ideal for those who want to see as much as possible in a day or two.
And it's free!
A Complete Guide on how to do this is available at the official website: www.singaporecirclelinetour.com