Do you mean ariel's grotto? and where do you find the crystal becuase i looked everywhere. i think it's in that chest stuck in the whole by ariel's grotto, but i don't know how to get the chest out becuase it has no trinities by it. and also one more thing, where you're suppose to put the harp crystal is the blue thing on the wall in ariel's grotto, right?

thank you for your help :-)