Giant Mountains (Czech. Giant Mountains) belonging to the Western Sudetes, they are the highest part of the entire Sudetes, and also the Czech Massif. They have been the border between Silesia and the Czech Republic for centuries (Main after the Second World War (Silesian) The Polish-Czech border was marked out along the ridge). From the general area of the Giant Mountains, amounting to 650 km2, within the borders of Poland there is less than that 1/3, tj. 185 km2. The bandwidth is maximum 20 km, and the length 36 km. The main ridge is divided by the Karkonoska Pass (1198 m n.p.m.) to the higher eastern part, with the culmination of Śnieżka (1602 m n.p.m.), the highest peak in the Karkonosze Mountains) and Smogornia (1489 m n.p.m.), and the lower western part with Wielki Szyszak (1509 m n.p.m.) and Szrenica (1362 m n.p.m.).
In the west, the Karkonosze Mountains reach the Szklarska Pass (886 m n.p.m.) and border with the Jizera Mountains. In the east, their range is marked by passes: Kowarska (727 m n.p.m.), followed by the Rudawy Janowickie, and Lubawska (516 m n.p.m.), behind which the Raven Mountains begin. From the north, they pass into the Karkonoskie Foothills (separated by a lowering of the Śródgórski Padół) and are adjacent to a distinct morphological edge on the tectonic fault line (Piechowice-Sobieszów-Sosnówka Dolna-Kowary) with the Jelenia Góra Valley, in the south, however, the border is less clear and is conventionally drawn among the hills of the Karkonoskie Podgórze (Jilemnice-Vrchlabi-Mlade Buky).
Krkonoss names, Krkonossy come from 16th century sources, but their etymology is not definitively elucidated. One of the concepts connects them with Polish taverns, Czech krć – denoting the trunk of a tree; something huge. It would be related to the names of these mountains: Latin Montes Gigantei and German Riesengebirge, which in both cases means the Giant Mountains. Another concept derives the name of the mountains from the personal name of Karkonos (having a nose like a trunk, synonym of the Polish Krzywonos) and defines an area belonging to a man with that nickname.