Small in size but big in character, Koh Tao is the Gulf of Thailand’s diving capital, long celebrated for its clear waters and thriving marine ecosystems. Its name—meaning “Turtle Island”—reflects both its distinctive outline and its history as a nesting site for sea turtles. Just offshore, a necklace of coral reefs encircles the island, offering world-class dive and snorkelling opportunities. Highlights range from the dramatic underwater pinnacles of Chumphon, where barracuda, scorpionfish and colourful anemones flourish, to the soft corals of Shark Island and the sheltered formations at The Twins, home to rare saddleback clownfish. When back on land, Koh Tao reveals a different kind of beauty: forested hills crisscrossed with trekking routes, panoramic viewpoints reached by short hikes, and quiet beaches perfect for an afternoon of sun and sea. It’s a compact island with enormous appeal—especially for travellers who want adventure above and below the waterline.