Bad Langensalza is a spa town located in the Unstrut-Hainich district of Thuringia, central Germany. It sits within the Thuringian Basin, characterized by fertile lowlands along the Unstrut river, while the Salza river flows through the town before joining the Unstrut approximately two kilometres to the east. The landscape is largely flat and intensively farmed, rising to the Hainich, Heilinger Heights, and Fahner Heights.