The raised bog is located at an elevation of 950 metres above sea level (NN) in a high forest clearing southwest of Carlsfeld. The border between Germany and the Czech Republic runs through the reserve. West of the Kranichsee is the "black pond" (Schwarzer Teich).
The name of the bog is related to the Slavic word granica, which means border.
It is a watershed and krummholz bog that is drained to the northwest by the Große Pyra and to the southwest by the Rolava. To the east is the Kleiner Kranichsee, where the heart of the bog, unlike the Großer Kranichsee, lies on the German side of the border.
- Mountain pine (Pinus mugo)
- Hare's-tail cotton-grass (Eriophorum vaginatum)
- Black crowberry (Empetrum nigrum)
- Bog bilberry (Vaccinium uliginosum)
- Bog rosemary (Andromeda polifolia)
As early as 1900 the Ore Mountain Club branch at Carlsfeld laid a corduroy road into the bog and erected an observation platform that has since disappeared. The raised bog is protected as a nature reserve.
- Der Große Kranichsee. In: A. Marx: Bunte Bilder aus dem Sachsenlande, Vol. IV, pp. 1–6, Dresden, 1927.
- Die Bergbaulandschaft von Schneeberg und Eibenstock. Edition no. 1 Akademie-Verlag Berlin, Berlin 1967 (Werte der deutschen Heimat. Vol. 11). pp. 172–176.