From the hot temperatures which emerge from deep underground have created the Thermal Springs of Nysiros. These springs  have therapeutic properties for arthritis, rheumatism and dermal disease while the temperature is between 30-60 degrees Celsius. The three Natural Thermal Springs are of Loutra located on the northern side of Mandraki, the spring of Thermiani located next to the church of Panagia Thermiani in Pali and the spring of Avlaki located on the northern side of the island.