Numerous thermal springs in Slovenia were discovered in ancient Roman times and their soothing and healing effects can be experienced in the numerous natural spas and thermal resorts that emerged along their sources. The largest is in eastern Slovenia, while they were also discovered in other parts of the country, for example in Bled Lake. Among the springs, a special healing spot is reserved for the Radenska mineral waters spring in Radenci and Donat Mg in Rogaška Slatina. The healing mud along the springs is used in the spas to prepare wraps as part of various balneo therapies.