Recommendation by Wabisavi
Connected to the mainland by a small bridge, Coney Island (also known as Serangoon Island) is a local favorite of weekend hikers and bikers. Trails are easy and mostly shaded, and there are several resting spots (take note however that there is only one toilet, which is more often than not out of order). It takes about an hour to walk the length of the island, and along the way you can enjoy a large variety of equatorial plants,including a few that are extinct on the mainland. Continuous efforts are being made to encourage the growth of mangrove clusters, where a keen eyed hiker can spot the peculiar climbing crabs. Coney Island is also a popular spot for birdwatching, especially early in the morning. Bikes can be rented near the Punggol entrance. Remember to bring water as there are no provisions on the island. Open everyday from 7 am to 7pm.
Serangoon Island, Singapore