If you are looking to take care of your body with a perfect spa therapy, then the premium Himalayan salt rock sauna at Serena Resort Kim Boi will be a useful option for you. The salt rock sauna at the Serena Resort Kim Boi with almost 100 natural minerals in salt rock crystals combined with infrared steam and negative ions will eliminate harmful toxins accumulated inside the body to give the spirit a refreshing, abundant life energy.