Sentosa is a tiny island next to the main island of city-country Singapore. The island, like rets of Singapore, has been made after a lot of planning and has a near perfect infrastructure. It was probably made to give the ever busy Singaporeans a well needed break, but now is a prime tourist attraction.
The best way to go there is on the cable cars. Most of the attractions are worth a visit and the laser show by the Merlion should not be missed. The best of the many attractions out there is the underwater world. It has some of the most exotic sea creatures on display.
A person after reaching there should take the mono rail ride all across the island which will give him/her a good overview of the place.
A walk up the Merlion is also recommneded