Sands of Understanding

Sands of Understanding is a bag-shaped object in The Sims 3: World Adventures, and is only known to be available for purchase in Shang Simla from a special merchant while having visa level 1 for Shang Simla.
Using it in a tomb (presumably landmark tombs), will show nearby secrets in that tomb.
Using it at any other type of lot, will have no effect, and will in fact return to the Sim's inventory.