The second largest island of Mozambique’s Bazaruto Archipelago remains a low-key idyllic drop in the Indian Ocean—the island sits within a national marine reserve. It is about to see its tourist profile rise with the opening of the Kisawa Sanctuary, the world’s first 3-D-printed resort built with sand and seawater mortar. The ultra-exclusive 12-bungalow resort is a beautiful base from which to explore Benguerra Island’s flamingo beaches and pristine coral reefs, where dugongs, manta rays and tiger sharks dwell, with minimal human interaction. This one-of-a-kind experience comes with a hefty price tag, though: nightly rates for bungalows start at almost $6,000 and include a butler, meals crafted by private chefs, a sunset sail and a massage. —Travis Levius