The Holy Mountain. This peninsula has been declared a world heritage site by UNESCO. It hosts many monasteries on its green rugged slopes which are home to about 2000 monks. Women are NOT allowed to enter Mount Athos and men MUST apply for a permit months before their visit here. Even when the permission is granted men can only stay up to 4 days. Though women and men without a permit can get onto excursion boats that sail around Mount Athos to view the monasteries and other sights from a distance. Special events such as conferences, lectures and exhibitions are organized in order to promote religious and charitable work.