Thod's Crystal Caverns

Publisher's blurb: The forest gives way as you find yourself at the entrance into the depths of a cavernous rocky hollow. Passages fork off the main tunnel, one leading to a small chamber with a small stream which then curves to connect to a small cavern full of rubble. Another small cavern contains some ferns and bushes. While a small pool of water can be found under a small overhang as you travel deeper into the cave system, It’s glass like surface perfectly still. The passage curves around and meets with a large cavern where above a pond is a rocky structure with piles of blue crystals.