India, Jan. 4 -- In Blue Zones, residents tend to enjoy remarkable health and unexpected longevity-and in the Caribbean, there's an entire island embodying this health-first, preservation-minded ethos. Named the world's first "Blue Destination," Bonaire has been dedicated to preserving its delicate ecosystems for decades, protecting 20 percent of its land and 100 percent of its oceans. Thanks to the island's forward-thinking sustainability practices and its safe distance outside of the main hurricane belt, Bonaire boasts some of the world's most pristine reefs, teeming with life and color.

Naturally, the island is a haven for scuba divers. "But beyond the snorkeling and diving, Bonaire offers a kind of authenticity, simplicity, and retur...