Each of the Como resort’s 33 over-water bungalows has a private terrace that lets guests jump straight into the lagoon and snorkel amidst colorful fish and coral. Some of the larger suites are built in the shape of dhoni boats, the traditional wooden vessels used by local anglers. Cocoa Island is home to some of the best diving in the Indian Ocean, with at least 25 sites near the resort, including a shipwreck. Como recently launched its Coral Propagation Program, which allows guests to help protect and regrow the 1,000-plus species found around the resort by planting a coral frame. From $1,100.