Underwater World is without a doubt one of the most-visited attractions on Sentosa. Everybody comes for the tunnel: 83m (272 ft.) of transparent acrylic tube through which you glide on a conveyor belt, gaping at sharks, stingrays, eels, and other creatures of the sea drifting by, above and on both sides. If you're lucky, you might see the scuba diver who hops in several times a day and feeds them by hand. In smaller tanks, you can view other unusual sea life, like the puffer fish and the mysteriously weedy and leafy sea dragons. The price also includes admission to the Dolphin Lagoon, with pink dolphin shows daily at 1:30pm, 3:30pm, and 5:30pm, with an additional show at 11am at weekends.