Although it's nearly impossible to imagine, tiny Flat Island, as the locals call it, once had its own king, navy, railroad and even an airstrip, which consisted of a dirt runway. These days traces of this illustrious past can still be found on ​this uninhabited island, especially evidence of the pioneering families who produced lime and farmed cotton on this 100-hectare piece of land. Most visitors come to enjoy the beautiful beach at Baie Blanche, which boasts interesting rock formations, but its pristine coastline is also a major draw as it's home to the greatest number of fish in the area. You can snorkel with huge tortoises that feed on the seaweed day and night. There is no regular ferry service to the island, but you can book an organised excursion from St. Maarten.