The metro system of Singapore has spread its roots around to most of the city-state. You probably wouldn't need any other transportation method to navigate the streets of Singapore. The MRT, or rather, the Mass Rapid Transit can take you anywhere, even from the airport to your hotel. Purchasing a Singapore Tourist Pass can save you cash and time, which gives out unlimited travel for as many times as you'd like, depending on which type you purchase. From one day passes available at 10 SGD, you can purchase passes that are valid up to three days, which would cost around 20 SGD.