The most famous examples are the Nordenau Cave Spring in Germany and the Lourdes Spring in France. These springs have cured many people of all sorts of diseases. More than one million people from more than 100 countries come to visit the springs each year. In a series of studies, scientists in Japan and Germany have shown that the basic reason for the healing power of spring water is that it is rich in hydrogen, which is why it does not work once the water is taken from the region, because it’s so easy for hydrogen to escape.