spa at the interface

When I hear the word underground, the first thing that comes to my mind is a cave, so I wanted my spa to evoke that atmosphere. It's a place, where you can hide from reality, where there are no dangers, but only peace and rest. The narrowing entrance staircase draws the visitor in and he can leave all negative thoughts behind. I have based the composition on the journey to the light, even though it is an underground structure. One first enters the dark underground, but if he goes further, he can get through a labyrinth of spaces into an open atrium with a spring full of light and still be hidden from the outside world.