Cairns Jet Boat Ride. Get your adrenaline pumping on a Cairns jet boat ride. As you zoom across the waters of Trinity Inlet, hang on tight while the experienced boat captain performs spins and other maneuvers to make sure you stay cool in the splashing water. Admire landmarks from the boat, and keep your eyes open for marine life—you may get lucky and spot a crocodile. It’s a great way to spend 35 minutes in Queensland’s tropical heat. Book and Save 10%: Cairns Jet Boat Ride.