Visualize an unseen waterfall, hidden deep within the confines of a lush, dense jungle. The waterfall cascades steadily into a calm, peaceful pool, the waters of which are incredibly serene. Surrounding the pool, a flourishing array of foliage intensifies the feeling of seclusion. There's a mist, originating from the waterfall's spray, meandering upwards. This mist dances with the sunbeams filtering through the thick canopy overhead, collaborating to produce a subtly visible rainbow in the humid jungle air.