Hat Chao Mai National Park . This park covers the coastal areas in Amphoe Si Kao and several offshore islands. Beautiful beaches in the park include Hat Pak Meng, Hat Chang Lang, Hat San, Hat Yao, Hat Yong Ling and Hat Chao Mai. Some parts of the island are private rubber and coconut plantations. There are white sandy beaches and coral reefs around the island.
Accommodation is available.
Ko Muk and Tham Morakot, the most wonderful island in the park, is located 30 minutes by boat from the Khuantungku Pier. There is a fishing village on its eastern coast. The other areas abound in limestone cliffs which is home to numerous swallows. There is a truly amazing place called Tham Morakot where a lagoon with a small sandy beach is surrounded by high cliffs. The entrance to Tham morakot is mostly underwater and can be entered only at low tide.