Where am I?

I stand on my feet for a few long seconds, catching my breath. The water is hot and, despite the near-**** experience, quite pleasant. My heart calms down, the adrenaline is washed out, the cold grip of **** lets go of my stomach, and all of a sudden I feel exhausted. I paddle away mindlessly until the water gets shallower and I have to lean back to keep my body submerged.

I lay back on the smooth bottom, observing my surroundings. There are torches and lanterns all around the crater, and a glossy spider web of reflected light is dancing spread all across the walls of the cave. The cave looks manmade, a bubble of stone over the gagged mouth of a sleeping volcano. Too smoothly made to be natural, too big and heavy to have been manmade, there had to be magic involved in its creation. The heat on the other hand is all natural; bubbles of raw energy swim in the water, and ancient magma, the blood of the world, flows not too deep underneath.

I’m facing the entrance, a short low corridor leading to the outside, judging by the sunlight at its edge. There is a box, with discarded clothes spread all around it. Some gear too; a sword in its scabbard, a hip and a chest pouch, a leather backpack. A ruby amulet in the shape of a crow's skull that I’m supposed to be wearing. I let out a sigh, and let my head fall back.