From the entrance of the Khao Sok Las Orquideas Resort, follow the road to the right and reach the intersection at the higway 401 turn left and go direction to Phanom and Surat Thani. About 500 meters on your left you can see a building under construction; it is the local temple of Khao Sok.
To enter the place you have to pay 20 baht.
Right next to the entrance, where the jungle begins in the mountain, there is an area where several monkeys coexist peacefully. They wait for tourists to give them food and water. Inside the complex, you can visit a small cave converted into a temple containing Buddha images inside.
This tour can be supplemented by going to see the viewpoint and waterfall next to highway 401 direction to Takua Pa.