They found that the rock stacks, some of which have balanced for 18000 years, must have withstood multiple major quakes.

他们发现这些岩石堆，有的已经存在1.8万年，必定经历了多次的大地震。

I think the reason for that is that it's got such a variety of scenery from cool temperate rainforests to the cliffs and rock stacks around the Twelve Apostles.

我认为这是因为它拥有如此多样的风景，从凉爽的温带雨林到十二使徒岩周围的悬崖和岩石堆。