The park has mountains of various sizes and plains in the valley. The highest peak is Khao Khrok which is some 329 metres high. Visitors can see a clear view of the town and neighbouring districts from here. The park is also home to pheasants, jungle fowls, barking deer, monkeys, wild boars, and birds of various species, especially Princess Sirindhorn Bird or the White-eyed River Martin. Khao Sam Lan National Park offers several waterfalls: Sam Lan waterfall is a wide stone plateau that falls down 3 levels and is similar to stairs. Pho Hin Dat waterfall  is 300 metres from the park office and has a wide stone plateau and a single-level waterfall which is suitable for swimming. Ton Rak Sai waterfall is some 300 metres from the park office and 500 metres from Pho Hin Dat waterfall, and originates from the same stream as Pho Hin Dat waterfall. The lively stream flows through Pho Hin Dat waterfall before running into Ton Rak Sai waterfall, a 7-metre one-level waterfall. Touring around these attractive waterfalls can be made within 2-3 hours on walking trails where visitors will not have to use the same trail on their return.

In addition, there are other splendid waterfalls that can be reached by walking for some distance from the park office: Khao Daeng waterfall  (800 ms.), Kuak Ma waterfall  (2 kilometres), Krok I Wo waterfall (3 kilometres), and Nang Chon waterfall (6 kilometres)

The park offers camping sites for eighty persons (visitors must bring sleeping bags by themselves). For visitors who bring their own tents, the park accommodates campsites. Call the National Park Division, Royal Forestry Department, Bang Khen at 0-2561-4292 ext. 724-725, 0-2579-5734 and 0-2579-7223.