Nízký Jeseník
Nízký Jeseník (, ) is a flat highland and geomorphological mesoregion of the Czech Republic. It is located in the east of the country in the Olomouc and Moravian-Silesian regions. Nízký Jeseník is the largest Czech geomorphological region, and is known for the former volcanic activity. Etymology
According to the most probable theory, the name has its origin in the word jasan, i.e. "ash". Jeseník (respectively Jesenný stream) was first the name of a stream that flowed through an ash forest in a valley. The name was Germanized to Gesenke (i.e. "slope") and used as a name of a small town that was founded in the valley (but later disappeared), and then it was transferred first to the valley, and then to the whole mountain range. Later the name was changed back to Czech Jeseník. Jeseníky (plural form of Jeseník) is a collective term for an area that includes the mountain ranges of Nízký Jeseník (i.e. "low Jeseník") and Hrubý Jeseník (literally "rough Jeseník"). Geomorphology
Nízký Jeseník is a mesoregion of the Eastern Sudetes, which is part of the Sudetes within the Bohemian Massif. It is described as a flat highland or low mountain range with an altitude that most often ranges between 400 and 600 metres above sea level. It is bordered with the Hrubý Jeseník and Zlatohorská Highlands in the north, with the Upper Morava Valley in the west, with the Moravian Gate in the south, and with the Opava Hilly Land and Ostrava Basin in the east. Nízký Jeseník is further subdivided into the microregions of Brantice Highlands, Bruntál Highlands, Domašov Highlands, Oderské vrchy, Slunečná Highlands, Stěbořice Highlands, Vítkov Highlands and Tršice Hills. Nízký Jeseník includes the best-preserved extinct volcanoes in Moravia. The highest peaks are:
Slunečná, 
Pastviny, 
Kančí vrch, 
Velký Roudný, 
Kamenná hůrka, 
Malý Roudný, 
Ptáčník, 
Rychtář, 
Červená hora, 
Bedřichova hora,

Geology
Nízký Jeseník originated in the older Proterozoic. Geologically, it is one of the oldest mountain ranges in the Czech Republic. In the Quaternary, there were five active stratovolcanoes, including Velký Roudný, Malý Roudný, Uhlířský vrch, Venušina sopka and Červená hora. With an age of 1.5 million years, these are the youngest volcanoes in the Czech Republic. Geography
The territory roughly stretches from Olomouc (southwest) to Ostrava (east), and to Krnov (north). Nízký Jeseník has an area of  and an average elevation of . It is the largest mesoregion and mountain range in the country. The most notable river in the territory are the Oder, which springs in the Oderské vrchy, the Moravice, where the reservoirs Kružberk and Slezská Harta are built, and the Opava, whose upper course flows through the north of the territory. Just beyond the borders are several larger cities, but right in the territory, despite its size, there are not many. A significant part of Nízký Jeseník belongs to the Libavá Military Training Area. The most populated settlements entirely located in Nízký Jeseník are Bruntál, Odry, Vítkov and Fulnek, and partly located in the territory are Krnov, Šternberk and Bílovec. Gallery

References

Sudetes
Mountain ranges of the Czech Republic