This swimming complex is located near the (newly-opened or to-be-opened, depends on when you read it) NTU extension green-line MRT station. Yes, just after Boon Lay.
With the entry fee of $2, it’s also a good spot to swim. Altough it doesn’t have as many facilities as its neighbor Jurong East, this is the only complex I found having two olympic size pools. One of the two has a rooftop, so it’s more convenient when it’s raining. There is a very high slide that you can use, and good news is you don’t need a float.
Other facilities are kids playground, jacuzzi, and stream pool.