I will rank up Shan Juan cave on my adventure list, even though i haven`t been there before, but i really like this kind of old caves. Evey time when i go to a cave, i like to listen to sound of the water drops from caves, which you can not hear often in daily life.

And usually if the montain have caves it must have waterfalls, i like the sound of waterfalls too, both are sounds, but one will make you peaceful, another will make you lound !