The first note of the settlement Königswarth is dated back to 973. Sometime between 1242 and 1287, a border castle was built above the Kynžvart gorge and used to collect tax and guard the military and trade route between Cheb and Plzeň. The owners of the castle supported Ludwig of Bavaria in his war with Charles IV. For that reason the castle, which was regarded as a “house of thieves“ (Raubhaus), was destroyed in 1347 or 1348 by a military unit of Charles IV, apparently without a big resistance. In 1398, the castle was restored and stood until 1648, when it was damaged during a siege by the Swedes. The mining of iron, silver and nonferrous metal in the estate was already recorded in the 14th and 15th century. Kynžvart was a one of the centres of mining during the time of the tin mining boom in the Slavkovský les Mts. in the 16th and 17th century.
In the 19th century, Kynžvart was declared as a spa town. It has several springs of ferruginous acidulous mineral water. The mineral spring Richard is collected from the overflow of a well, and the other seeps collect in boreholes for immediate use in the spas. The spa primarily treats children with upper respiratory problems.
Cadastre: Lázně Kynžvart
Composition type: hydrogen carbonate-sulphate-calcium-magnesium acidulous water
Temperature (°C): 9
Capture: well
Depth (cm): 930
Content of CO2 (mg/l): 3150
Sea level (m): 705