There are many local Cairns activities to choose from during your visit including the Great Barrier Reef, Cape Tribulation Rainforest and many other Cairns tours. If you are wondering what to do in Cairns try White Water Rafting with Foaming Fury. White Water Rafting is one of the most popular things to do in Cairns. The half day Barron River tour only takes 20 mins to get to from Cairns. Have a look at the tours we do and see why rafting is one of the most popular Cairns attractions.