Kusu (Tortoise) Island was located on the south of Singapore and about 35 mins by ferry. It gots it name, as legend says, when a tortoise turned into an island to save 2 shipwrecked sailors.
On the island, there is a Chinese temple..... and a Malay Kramats (Shrine).
And for beach lovers...
For foreign visitors, unless you have much time to spare in Singapore, Kusu Island would not be a top priority for you.