This exclusive resort on Hamilton Island is surrounded on all sides by the largest contiguous coral reef in the world: the Great Barrier Reef. Here, guests can spend days exploring the 2,000km-long spectacle by boat, helicopter or seaplane, with two-tank dives or simple snorkelling gear opening up a world of tropical colour.
Later, relax in the resort's sumptuous spa; dine on fresh fish at the seafood restaurant; then slumber in one of 60 modern pavilions or beach houses, which each have a private pool and deck.
Qualia, 20 Whitsunday Boulevard, Hamilton Island, Queensland, Australia (00 61 2 9433 3349; qualia.com.au). Doubles start at A$975 (£635), including breakfast. Diving from A$115 (£74).