I heard a sound after a walk through corridors illuminated with crystals (watching my step extra careful this time). I already knew what it was, so I followed it. Soon after I approached another opening, much more spacious this time, as there was a waterfall. 

Up till now it was so quiet, the familiar noise of crashing water was somehow soothing. It's pretty as well, with a lot of crystals creating mini rainbows. 

There are also giant mushrooms around, in few different colors. They look so round and soft like balloons. I have that urge to jump at them... but for now I have to figure out how to get down there. The tunnel I'm at is a hole in the wall, several feet above the lake.