Treasure Bay

Treasure Bay houses Bintan's top attraction, the 800-meter-long Crystal Lagoon, which pumps filtered seawater into a blindingly turquoise artificial lake surfaced with concrete and plastic. The entrance fee gets you access only to the shallow beaches, where kids can splash around under a lifeguard's beady eyes. To access the rest of the lagoon, you'll need to pony up extra for the various water sports available, ranging from water slides and kayaks to cable skiing and underwater scooters.