Tourists and pilgrims are visiting wonderful water spring in Górka Klasztorna for years. Marian sanctuary in Górka is located in Wielkopolska, central Poland. History of apparitions and also spring exploitation dating back to the 11^th century. The research area is built from Quaternary deposits, what forms groundwater chemical type. This is the result of the continental glacier (north-Polish glaciation). The dominant multiaquifer formations are Quaternary and Tetriary. Wonderful water is mineral water (1104,3 mg ∙ dm^–3), with a slightly alkaline pH (7,51 pH) and oxidizing conditions (Eh +208 mV). Water is a calcium-bicarbonate chemical type (Ca-HCO₃ ). In this paper attention is paid to the content of calcium ions (226,6 mg ∙ dm^–3) and bicarbonate ions (619,7 mg ∙ dm^–3). Included an increased concentration strontium (0,35 mg ∙ dm^–3), iron (0,37 mg ∙ dm^–3) and manganese ions (0,11 mg ∙ dm^–3). Wonderful water for its medicinal properties assisted by the acidity, diabetes, metabolism and keeps normal heart function.

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