Solec-Zdrój is a spa town in Poland in the Świętokrzyskie Voivodeship. It is situated on a gentle hill on the edge of the Lesser Poland Upland and the Sandomierska Basin on the Rzoska River, 17 km southeast of Busko-Zdrój.
The name of the village derives from the saline springs that used to be found in the nearby meadows. The existence of the village is already confirmed in the first half of the 14th century. In the middle of the 15th century Jan Feliks Tarnowski was its owner and the Solecka municipality at that time consisted of 6 villages. From 1508 Solec, together with the neighboring Zborow, became the property of the Zborowski family. From the 18th century, salt was brewed from local waters. In 1815, the Mining Council of the Kingdom of Poland Becker discovered salt mineral water springs in the village. They were used for bathing from around 1820 after their healing properties were recognized. In 1837 Charles Godeffroy founded a spa in Solec. At that time, spa and residential buildings were built and an adjacent 100-hectare coniferous forest area was attached to Solec.
In the spa, diseases of the musculoskeletal system and rheumatism as well as skin diseases and allergies are treated. During geological investigations near the spa, a brine was discovered whose hydrogen sulfide content is 8 times higher than that of the previously used springs. It is a mineral water spring of this type that is unique in the world (Translated from Wikipedia).