The prettiest islands in the world

The island’s star attraction? The Great Blue Hole, a perfectly circular, underwater sinkhole of limestone that measures 300 feet across and 400 feet deep deep.

The seemingly bottomless pit is home to underwater species like blacktip tiger and hammerhead sharks. Other sightings include angelfish, neon gobies, butterfly fish, and small groupers.

The Belize Barrier Reef Reserve System, meanwhile, is a UN-designated World Heritage Site. If you’re not a diver, visitors can also visit the ancient Mayan ruins in a day trip, and jungle trek through the island’s lush tropical forests.

Here are the top 10 islands in TripAdvisor’s Traveller’s Choice Award 2013: 1. Ambergris Caye, Belize

2. St. John, US Virgin Islands

3. Bora Bora, Society Islands (French Polynesia)

4. San Juan Island, Washington, USA

5. Santorini, Cyclades, Greece

6. Isla Mujeres (off the coast of Mexico)

7. Moorea, Society Islands (French Polynesia)

8. Koh Tao, Surat Thani Provence, Thailand

9. Easter Island, Chile

10. Nosy Be, Antsiranana Province (off coast of Madagascar)