One of the state’s best-kept secrets, the fireflies colonies at Kampung Kuantan and Kampung Bukit Belimbing are a rare natural phenomena. These tiny insects live on berembang (Sonneratia caseolaris) trees that grow in the brackish waters. The fireflies all are found on the mangrove tree species called berembang. Fireflies are also known 'Lightning Bugs' and they shine brightly at the night to attract a suitable partner. Apparently, they are able to shine during the day too but humans then cannot see it. They are only seen at night in and along the 'Berembang' trees along the Selangor River. Enjoy a seafood dinner and boat ride along the river to watch this enchanting display. (Free Boat-ride)