Although they're a little difficult to find, the Santubong rock carvings on Sungai Jaong are worth seeking out if you have an interest in archaeology. There's said to be nearly 40 of these artefacts, mostly carvings on boulders (including a distinct human figure), though it's unlikely you'll be able to find that many without spending quite a bit of time looking around. An accurate dating of the site hasn't been made yet, but it's thought to be at least a thousand years old.
Chinese ceramic pieces from the Tang dynasty and evidence of iron making have also been found here, making it one of Sarawak's most important archaeological sites. To reach the petroglyphs, turn into a gravel road south off the main road going into Santubong, about 3km after the turn-off for Kampung Buntal and near the 6km marker on the road to Damai. The gravel road will take you to two houses and a walking trail to the rock is behind them. You will more than likely need to ask a local for directions. The site is called Batu Gambar in Malay, but don't be surprised if the first local you ask does not know about it - keep trying and you'll find someone who does.