For most people, spending hours deep underground in darkness would seem an odd prescription for better health. “I tried every possible treatment, and this is the only thing that worked,” said Mikayel Torosian, an asthma sufferer visiting the clinic. View image in fullscreen Anush Voskanyan (right), a speleotherapy doctor, and Alvart Alihanyan, a nurse, walk around the clinic to gather the patients for breathing exercises. View image in fullscreen Anush Voskanyan, left, and Alvart Alihanyan, right, do breathing and fitness exercises with patient Marine Koklyan. View image in fullscreen Doing activities in the salt caverns is thought to help treat bronchial asthma, bronchitis, allergic and chronic sinus diseases, allergies and skin diseases.