Treasure!

Climbing through the door, you find some stone steps. They are worn in the centre and dark with moisture. You carefully walk down into the darkness. You are amazed to find the steps lead you to a cave with a sparkling waterfall cascading in the middle. There mst be light finding its way in from somewhere but you don’t stop to investigate – the water looks too inviting. You reach your hand into the crisp, cool flow and feel something perched on the rock behind. Pulling it out, you see it’s what you seek: the crystal.