Prometheus was a Greek Titan. Possibly one of the most important Titans, as he stole fire from Zeus and gave it to the humans. This system was developed to resist those forces through technological means.
A large vertical cave has a constant, strong wind blowing out of it from the bowels of the earth. If one was to jump into the currents they would have a controlled ascent on the winds till they reached a height where their weight and the winds force reached equilibrium. Impossible to climb down naturally. What is it? Natural winds from the earth or a complex magical protection for an underground lair?