The Holy Hill Grabarka is one of the most important orthodox sanctuaries in Poland.The sanctuary ventilationstejp is situated in Podlasie region between Bug and Narew rivers.It grew in the shade of well developing (in the first centuries of the second millennium) towns Mielnik and Drohiczyn.The most striking thing is that spyderco urban the church is surrounded by a forest of thousands of crosses brought by pilgrims.The study present 64 species of epiphytic, epixylic, epilythic and epigeic lichens.
Among 64 lichen species 11 are considered to be threatened in Poland.