Trung Trang (Trung Trang Cave) is easily accessible, but you will need to contact a ranger to make sure it is open. Bring a torch (flashlight) as it is gloomy inside. There is a challenging 18km hike through the park and up to one of the mountain summits. Arrange a guide for this six-hour hike, and organise a bus or boat transport to the trailhead and a boat to get back to town...