Bad Berka is a German spa town, situated in the south of Weimar region in the state of Thuringia. With its almost 8,000 inhabitants Bad Berka is the second biggest city in Weimarer Land district. The river flowing through the town, which is embedded in new red sandstone, is called Ilm. Since 1 December 2008, the city has incorporated the former municipality of Gutendorf. Bad Berka is a spa town with an iron-rich spring and Kneipp facilities.