Ditch the crowded shore dives and boat out seven miles to this sanctuary marked by a massive iron lighthouse. The shallow coral gardens mean you actually see the brain coral and parrotfish without scuba gear. Book the Honest Eco morning sail to beat the afternoon chop and crowd; the 5.0-rated guides help you spot nurse sharks hiding under ledges. Spend three hours here, but skip the midday trips when the water gets murky from tourist traffic.
