Τhe third peninsula of Halkidiki, the peninsula of Athos, includes Mount Athos which forms a monastic state in which resident more than 2.000 monks. The entrance In Mount Athos is not free for everyone but visitors need a special clearance which is called Diamonitirion. Apart from theHoly Mountain in the third peninsula of Halkidiki there are also other interesting places that you could also visit.