The Kammerbühl (503 m above sea level) and the nearby Eisenbühl are the only volcanoes active in prehistoric times in the Czech Republic. The two mountains are about three kilometers southeast of Eger.
The cinder cone Kammerbühl is with 72,000 years one of the younger volcanoes in Europe. Located at the bottom of a dry lake, today's Cheb Basin, it was created by an eruption with so-called Strombolian activity. The loose masses that had become ash and slag at the eruption settled eastwards, while the lava that flowed out after the outburst of gas filled the volcanic gap and solidified into basalt.
Already Goethe visited the volcano. In 1951 the Kammerbühl was placed under nature protection. He is a Czech natural monument. Taking along volcanic rocks is a punishment.