Concealed within an enormous limestone hill, The Gomantong Cave is Sabah’s most extensive cave systems, and is famous for bats, swiflets and scattered with prized swiflets’ nest. If you are lucky, you can watch the harvesting of the birds' nests. Afterwards you will be heading towards Bilit Jetty and take a boat ride to reach Bilit Rainforest Lodge for lunch. Once your energy is recharged, your river cruise along the Kinabatangan river, the second longest river in Malaysia will start. Spot a variety of wildlifes along the river, including the orang utan, crocodiles, snakes and many bird species. Don't forget to bring your family and friends along in this tour.