By gently rocking the boulder a thread can be passed underneath; seemingly appears as if the additional weight of a few pounds, or a strong wind, would send it sliding down from the place it has occupied for unknown centuries watching over three thousand feet into the sloping valley beneath and we know what freakish law keeps it in its position.

Anyway pious Buddhists attribute it to the power of the relic enshrined in the pagoda.

This relic is a hair of Gotama given to a hermit residing on the mountain by the Buddha himself as he was returning from the second heaven of the Nats whither he had gone to preach the law to his mother.
However, barring any natural disasters, the pagoda probably isn't going anywhere anytime soon. The stone hasn't moved for hundreds of years; perhaps the single hair of Lord Buddha, upon which the pagoda is erected, is somehow keeping this gargantuan rock from slipping away...?



From www.kirchersociety.org