When the sun is just right, the sunlight ray reflected by minerals in the water, especially magnesium, creates an unique blue spectacle inside the transparent waters in the darkness of the cave. Between April and September there happens the alignment phenomenon, in a such a way that the rays hit the deep ground of the blue well inside the cave. On full moon nights between October and March you have the same exquisite scene under the moonlight. Access to this pond is highly controlled for environmental protection of its rare and delicate ecosystem.
