The main reason for visiting the park is to try and observe the tarsius monkey that is usually only seen at night. The tarsius is the smallest primate on the planet, only a few inches tall, but rarely seen. However guides seem to know where they are hiding out and will escort you to see them for a fee. We stayed in Batu Putih village, which is on the northern edge of the park for two weeks and explored the park ourselves in search of the Black Crested Macaque monkey and eventually after a few days we were lucky to find many and we were able to sit quietly among them and observe their behaviour. Afterwards we would take a swim in the sea on the edge of the park and sometimes monkeys would also come down to the water's edge. The sand is black due to the nearby volcano and usually we had the beach all to ourselves. There are a few guest houses/homestays including meals where you can stay for a very reasonable price.