The Great Cave
Niah is another attraction to tourism in north east region of Sarawak (Miri). It is the place of oldest modern human settlement and civilization found in this region. In year 1958, 40,000 years old remains of a modern human (Paleolithic Era - earliest stone age) was found by Tom Harrison and his archaeology team at a dig of West Mouth of the Great Cave, this discovery was finally proved by modern scientific dating techniques.

The Painted Cave
A wall painting that depicting the boat journey of the dead into the afterlife. Most importantly the painted wall was explained by the discovery of a number of death-ships on the cave floor - a boat-shaped coffins containing the remains of the deceased. The death-ships burials have been dated as ranging between 1 AD and 780 AD.
The human figures and the boats of the painting probably respresenting warriors and hunters with longboats carrying the soul of the deceased on the journey to the land of death or resting place. The atmosphere of the painted cave is very relaxing, it is easy to understand that why the early inhabitants had chosen a suitable resting place for their ancestors afterlife.

The Limestone
The limestone hills and caves of Niah National Park are part of the Subis limestone which covers an area about 16 sq. km of the park, which it was named after the Highest hill - Gunung Subis. Gunung Subis is mainly built of massive cliff forming limestone. Niah Great Cave is in a limestone hill separated by a gorge "a deep ravine (usually with a river running through it)" from the north east flank of Gunung Subis.

The gorge is to be believed as an abandoned stream valley and the Traders cave may represent a bend of this stream; deep horizontal groves were carved out in the walls of the cave by the eroding water and sediment load.