1. The Maldives.
Boasting luxury resorts with overwater villas, white-sand beaches and picturesque lagoons for water-sports, this Indian Ocean archipelago is a haven for honeymooners and bucket-list travellers, But the islands are also the world’s lowest lying, making them vulnerable to rising sea levels: They could be completely submerged by 2100.
2. Great Barrier Reef.
Stretching along Australia’s Queensland coast, this wonder of the world supports an extraordinary array of marine life—from sea snails to humpback whales, and of course, the corals that make up the reef system. Reputable outfitters will ensure you visit the reef responsibly, and see spots that haven’t been subject to climate change–induced coral bleaching.
Thailand’s coastal capital is at the mercy of rising seas and torrential rains. Flood-mitigation projects, however, are underway: Beautiful new Chulalongkorn University Centenary Park, for example, is designed to retain and divert almost four million litres of floodwater.