Bricks can be used to build Salt Cave for Speleotherapy, spa, gyms and yoga rooms and to decorate receptions and fireplaces as well. Speleotherapy means to be located in a room or area with a presence of Salt Crystal Rocks and to breath the healthful Ionized air. Speleotherapy is a natural health alternative treatment for asthma, respiratory conditions, immune system disorder and illnesses, used extensively in Hungary, Ukraine,Poland, Czech Rep. and Armenia.