A series of cold damp tunnels

You crawl through the tight tunnel, the thick cold mud does not make your travel easy. The mud is hard to push anywhere, you can only really push it in front of you making it even harder to move forward, and your lack of movement makes it hard to potentially push it to your side to lube up your body. This is one thing though, and still possible to make it through, the hardest part is still your swollen clit. Its larger build made it impossible for it to not touch anything. It gets squish by your healthy thighs, or it rubs against the mud which only flares it up. This trip is harsh, tears leak out of your eyes, still only one way to go now.

However much time passes, a thick wall of mud now stands in front of you. Your whole body & only piece of clothing is dirty, your arms are tired, and your clit burns like it's on fire. You're in an exhausted state. Your time of crawling seemly ends, as the wall of mud you have slowly built collapses in front of you. It falls through a hole in front of you, revealing a new area that you found.

Carefully crawling out, you drop out of the hole, finding your feet splash into some water. Looking around at your new location, you find what it looks like. Two large stone brick tunnels, flooded at ankle high with constate droplets of water fall from the ceiling, and finally s wooden planks, & random objects scattered as if a shipwrecked happen. The tunnels only move towards ahead a new area ahead of you, and the second tunnel leads behind you. With what you see...