Bonaire, part of the famed “ABC” islands, has been called the warmest place in the Caribbean — and its steady sunshine and turquoise waters make it a dream escape in any season.

The "ABC Islands" is an easy, breezy nickname for Aruba, Bonaire, and Curaçao, the three westernmost islands of the Leeward Antilles in the Caribbean Sea. Like diamonds cast in the blue waters north ...