Hawaii, USA

Hawaii, USA delivers the world's most geographically diverse Pacific island experience, boasting 11 of the planet's 13 climate zones in a single chain. The Big Island alone features active Kīlauea volcano, black sand beaches, and snow-capped Mauna Kea, with over 250 miles of coastline accessible to visitors. Compared to the Azores (#10), Hawaii offers 40% more endemic bird species and better-developed infrastructure for tourism, including direct flights from 25+ U.S. cities. Its coral reefs host 25% of all marine species in the Pacific, a measurable advantage for snorkelers seeking vibrant underwater life.