Bušotina

This geothermal borehole (bušotina) in the Pannonian Basin of Croatia or Hungary taps the deep bicarbonate-rich geothermal aquifer of Central Europe's most productive thermal region, supplying naturally warm mineral water for a spa or recreational bathing facility. The Pannonian Basin's geothermal boreholes, drilled from the 1950s onward as part of systematic Central European geothermal resource development, have been the primary means of accessing the region's deep thermal water resources where natural springs are absent or insufficient. The thermal water accessed by such boreholes underpins the remarkable thermal spa traditions of Hungary, Croatia, Serbia, and Slovenia — countries that collectively form one of the world's most geothermally rich cultural spa regions.