Escape into the big blue beyond. Go Down Under at the world's premiere underwater playground, the Great Barrier Reef. See the flora and fauna that call this natural wonder home, which is exactly what you'll do for the next 3 days as you snorkel your way around magnificent coral formations before returning to dry land. Haven't had enough? Check out the Rainforest Adventure tour and stay on solid ground for four days of tropical exploration.

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Want to stay longer? Check out Contiki's great rates to extend your trip, before or after!