Beginning each May, the Mary River Wetlands Cruise offers visitors an opportunity to explore one of Northern Territory's most significant aquatic ecosystems near Humpty Doo. The tour showcases Rockhole Billabong, which forms part of the Mary River system's most extensive year-round wetland habitat. This seasonal cruise experience allows guests to witness the dramatic transformation that occurs following the Top End's wet season. The waterways and surrounding landscape provide habitat for diverse wildlife species, making it an engaging destination for nature enthusiasts and families seeking educational outdoor activities. Located in the greater Darwin region, Humpty Doo serves as an accessible base for exploring these renowned wetlands. The cruise operates during the optimal viewing months when water levels and wildlife activity create favorable conditions for observation and photography.