One of the most fascinating landscapes in Germany is the volcanic Eifel. The region of the Eifel in North Rhine-Westphalia was not always as quiet as it is today. In earlier times volcanoes were active there. Remaining from this time are the 75 maars of the volcanic Eifel. The majority of the maars are dry maars, the remaining number is filled with water. The maars originated at least 10,000 years ago; however, many maars are much older. The landscape of the Eifel is characterised by mixed deciduous forests, streams flowing through meadows and numerous lakes.