Lim Canal -The Lim Canal is situated on the west coast of Istria, and it is a first rate natural phenomenon of great scientific and aesthetic value. It is a typical example of the sunken canyon valley in the Karst. It was created in the Iura limestone, with the length of about 10 kilometres.

The height of the canyon sides reaches up to 150 metres n/w. The position is east-west, while its slopes are situated north-south.
The Lim Canal is situated on the border between the Mediterranean and the sub-Mediterranean zone, and it represents an example of the influence of the expositions on the development of the vegetation. Northern slopes of the canal have southern exposition, which causes the development of the evergreen macchia of the Orno-quercetum ilicis, while the southern slopes of the canal are exposed to northern exposition, which causes an apparition of the sub-Mediterranean deciduous vegetation of Querco-carpinetum orientalis croaticum and white hornbeam.
Southern exposition is characterized by a direct entering of sun's rays, which causes a quick warming and a quick evaporation of the soil. Mesophilic plants can barely survive in such areas.
An oblique fall of rays in the northern exposition, and the sheltered condition of the slopes causes a weaker warming, less evaporation, a better maintenance of the soil, and more humidity in the air. For this reason, thermophilic plants can barely survive on northern expositions.
Regarding the fact that the frequency of species of an area clearly reflects its climatic conditions, the influence of the exposition as a microclimatic element was researched by Ilijanic in 1970 for the Lim Canal area.
On the southern part of the canal of the southern exposition, the coastal thelygonum cynocrambe L. was noted. This is the habitat situated to the extreme north in Croatia, and also the extreme northern border for this plant's range in general. Besides, we can also find the green Juniperus Oxycedrus "Rufescens Viriois".
Due to high natural and aesthetic values, the Lim Canal was proclaimed protected landscape with green fruits.