The Cross Spring was probably named after a wooden cross that stood near the spring.
Cross Spring is a strongly mineralised sulphate-hydrocarbonate-sodium ferric acid, which is used due to its laxative effects in the treatment of the digestive system (diseases of the stomach, intestines, gallbladder, liver and pancreas), in metabolic diseases (obesity, gout, diabetes) and also in allergic diseases caused by digestive disorders. The cause of the salty taste is the higher sodium content. The spring has a high content of solids, especially salts.
Although the Cross Spring is not the oldest spring in Mariánské Lázně, it achieved almost worldwide fame, especially in the times of the doctor Jan Josef Nehr. The Cross Spring was first mentioned in the annals of the Teplá monastery as early as 1749. At that time, the monks still referred to it as a "salt spring" or "salty acid" - it was called this because of its salty taste. In 1749, Damián Schultz, a pharmacist from Teplá, had a high cross made of hewn beams built near the spring, and the spring´s outlet was surrounded by stone blocks. From this moment on, the spring was called the Cross Spring.