1 Best Sight in Great Barrier Reef, Queensland

Knowledgeable marine biologists and conservationists give entertaining talks and multimedia presentations, usually to packed houses, about everything Great Barrier Reef–related, from sea turtles' sleep cycles to coral-killing starfish. Expect to learn more than you thought possible about the reef's evolution and the diverse inhabitants of this delicate marine ecosystem. The attached Marine Shop sells an array of reef-themed merchandise: T-shirts, DVDs, books, field guides, and souvenirs. Sign up for a Reef Teach seat by midday.