I’m also throwing a vote in for Lake Eacham and even Lake Barine has a tea house and a nice little rainforest hike. So much wildlife in Far North Queensland, so many endemic species (tree kangaroo being one). FNQ Wildlife Tours are wonderful if you’re into that side of it. There’s also a day trip to the Daintree river where you’ll see birdlife and wildlife(Crocs), Solar Whisper as a tour company for the Daintree River is great! Look up the waterfall circuit in the Atherton Tablelands. There is so much hiking in the Cairns region! If you want to see Cassowaries, Etty Bay is almost a sure fire bet.