Corroboree billabong is part of the mary river wetlands it is teaming with birds and also has the largest concentration of saltwater crocodiles in the world this one hour cruise is the closest wetland cruise available from darwin just under 90 minutes drive and the custom designed boat allows you to get up close to the wildlife for great photo opportunities designed for nature lovers cruising these scenic wetlands is an experience not to be missed and will be the wildlife highlight of your