For the ultimate great barrier reef experience grab an ultimate 3 day great barrier reef pass save money and see the reef from every angle on three cruises over seven days sail to low isles or green island or explore the reef from below on a snorkel and scuba diving catamaran cruise to the outer great barrier reef the ultimate 3 day great barrier reef cruise pass is your great value ticket to the reef customize your own great barrier reef experience choose three cruises from the following