The passenger said, “It sounds like your wind chime is broken, or at least out of tune.” The first mate just smiled. “That chime is music to a sailor’s ears, it is,” he said. “We will have smooth sailing this day.”
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?