Technicolor underwater wonderland where ancient coral gardens burst with tropical fish and impossible blues.
You and your friends are about to witness one of the planet's most absurd natural spectacles. The Great Barrier Reef sprawls across 2,300 kilometers of Queensland coastline, which means your group trip can be as chill or as adventurous as your crew decides. Some of the best things to do in Great Barrier Reef Australia happen below the surface — think swimming alongside sea turtles the size of coffee tables, diving into coral gardens that look like alien landscapes, and spotting reef sharks that couldn't care less about your GoPro. The water visibility averages 20-30 meters on good days, so even your friend who "doesn't really like fish" will lose their mind. Groups of 6-10 work perfectly here because most dive boats, snorkel tours, and island day trips are built for exactly that size. You'll split costs on multi-day liveaboard trips, coordinate dive certifications together, and have enough people to justify renting an entire sailing catamaran if you're feeling ambitious. Cairns is your…