It was not only the dramatic landscape of basins closed on the horizon by the Krušné hory and the Doupovské hory Mountains and by the Slavkovský les and the Český les Forests that was attracting many people from neighbouring and even more distant countries – the richest treasures were hidden underground. So people always used to search here for something and they were always finding something precious here – silver and non-ferrous metals in the Middle Ages, later on ceramic and porcelain clays, then coal, but, above all, their lost health. Some 150 years ago, the spa triangle Mariánské Lázně – Karlovy Vary – Františkovy Lázně was a fashionable centre of Europe, that maybe only Sankt Moritz in Switzerland could to a certain degree compete with…