Firefly Park Resort Bukit Belimbing in Kuala Selangor, Malaysia. Is the only place in this region where you can witness the sight of millions of fireflies flashing in synchrony, often referred to as the Eighth Wonder of the World. It is one of the must visit place of interest POI in Malaysia. You will be taken on a boat ride along the Selangor River where the fireflies inhibit around the branches of the Berembang trees along the riverbank. Here, up to thousands of fireflies may group together on a tree, beginning their display about one hour after sunset. A really bright display lasts for about two to three hours, continuing at lower levels until dawn.