||An inaccessible rugged mountain chain with high cliffs it the western part. The valleys of Kalama and Acheronta are included.At the northern part of the site there is the magnificent gorge of the Kalamas River, the slopes of which are densely covered with mixed broad-leaved deciduous and schlerophylous vegetation with Carpinus orientalis, Fraxinus ornus, Ulmus campestris, Celtis australis, Colutea arborescens, Ceratonia siliqua, Pistacia lentiscus, Cotinus cogygria, Quercus pubescens, Q. frainetto, Q. ilex, Q. coccifera, Acer monspessulanum, Phillyrea media, Hedera helix, Clematis flammula, Cornus mas, etc. The presence of Olea europaea and Pistacia lentiscus is noticeable along with the appearance of other characteristic species of the Thermo-Mediterranean vegetation belt in the deciduous zone of the Meso-Mediterranean vegetation belt. Within the site, occurs a riparian forest with Platanus orientalis, Salix alba, S. cinerea and Alnus glutinosa. Stands of Scirpus holoschoenus and Carex sp. grow along the river near the water.The area Stena of the Acherontas River is located at the southern edge of the site, and consists of calacreous rocks where maquis vegetation with the dominant species of Quercus coccifera, Phillyrea latifolia, etc., is predominant. The arborescent and scrub vegetation participate in higher and lower cover percentages, respectively. The chasmophytic vegetation which is composed of ecologically and phytogeographically interesting taxa, grows on calcareous rocks of high inclinations in the gorge, thus giving special ecological value to the studied site. The well-structured riparian vegetation is composed of the following dominant species: Platanus orientalis, Salix alba, Alnus glutinosa, etc.