The Strážník NNM is located around 2km south-east of the village of Háje nad Jizerou in the Liberecký kraj- Liberec Region. The monument was declared in 1963 on an area of 1.88 hectares and lies on the eastern slopes below the summit of Strážník hill (610m) at elevations of 570-590 metres above sea level. These woods are a unique locality where a rare type of star-shaped quartz can be found.
The distinctive form of Strážník Hill is visible from the summit of Kozákov in the Bohemian Paradise and is built of melaphyre of Permian age. The main subject of the protection is a section of the south-eastern slopes, where the base rock in penetrated by a hydrothermal seam with unique clusters of quartz crystals in the pattern of the sun’s rays. To protect this rare mineral, which was previously removed by collectors, the place where it was found has been covered with earth.
A modern spruce monoculture has replaced the native fir-beech stands, but we can still find plants in the undergrowths which are bound to beechwoods – herb Paris (Paris quadrifolia), asarabacca (Asarum europaeum) and woodruff (Galium odoratum). No exceptionally rare animal species were recorded here when research was carried out here, but birds such as the black stork (Ciconia nigra), crossbill (Loxia curvirostra), goldcrest (Regulus regulus) and mistle thrush (Turdus viscivorus) all live here.
Strážník is predominantly a mineralogical locality but we can state that the forest complex on Strážník hill and its surrounding are of considerable landscape and zoological value too.