Great Barrier Reef Tours Cairns | Sunlover Reef Cruises, Discover the outer Great Barrier Reef with Sunlover Reef Cruises! With Cairns Great Barrier Reef Tours to our Moore Reef pontoon departing daily, this Cairns Reef trip offers more activities and more value. Slide down our theme-park waterslide, snorkel the Great Barrier Reef, scuba dive and more!.