Human: Make a first person description of a magical setting inside a building with a waterfall, pool, rivulet, and phosphorescent algae. Assistant: 
A steady trickling sound emanates from a miniature waterfall in one wall. The waterfall feeds a crystal clear pool which empties into a narrow rivulet. The rivulet carries the water into a low tunnel in the opposite wall and disappears. Through the crystalline waters you can see phosphorescent algae growing in the bottom of the pool, glowing softly.