Festungshübel, Granite summit in Krkonoše Mountains, Czech Republic

Festungshübel is a granite summit at 1,012 metres on the southern spur of the Silesian Ridge, 3 km north of Špindlerův Mlýn and 500 m south of Davidovy Boudy. Its top, mostly covered by spruce forest with clearings, holds several granite crags up to 7 m high that allow a 360-degree view over the Elbe valley and the border ridge.

The granite formations developed through erosion processes that shaped the rock over thousands of years, taking their current form during the last ice age. This geological history continues to define the appearance of this mountain area.

The German name Festung (fortress) and the Czech Pevnost liken the granite blocks to a rock castle guarding the Elbe breakthrough above the mouth of the White Water. The rocks lie in zone III of Krkonoše National Park, where access is unrestricted and the crags may be climbed.

The summit can be reached via a forest path or by following the yellow-marked trail from Spindleruv Mlyn. Bus stops near Davidovy Boudy provide convenient access for most visitors.

The granite blocks are a textbook example of a tor, the landform type named after the rock towers of Dartmoor in England. Frost wedging along right-angled joints during the last ice age widened the fissures, and soil creep carried the debris downhill, leaving the blocks perched.