However, the archaeological museum is new and has no water supply, and the gallery with prehistoric artefacts is not open to public yet (as of Apr 2013).
For a better experience, you would need a tour guide who can tell you the interesting features of this place.
The admission is free, but you need to register before entering the archaeological heritage site.
Pic: this is the wooden staircase to reach the top of 500-feet-high Bukit Tengkorak, where the excavation site is located.
As you will walk under hot sun, you may apply sunblock lotion in advance.
Bring some water with you, and raincoat, just in case.