In biogeography, the Mediterranean Basin refers to the lands around the Mediterranean Sea that have a Mediterranean climate, with mild, rainy winters and hot, dry summers, which supports characteristic Mediterranean forests, woodlands, and scrub vegetation. As a rule of thumb, the Mediterranean Basin is the Old World region where olive trees grow. However olive trees grow in other corners of the world which have a Mediterranean climate, and there are many areas around the Mediterranean Sea which do not have Mediterranean climate and where olive trees cannot grow.
The Adriatic Sea ( /ˌeɪdriˈætɨk/) is a body of water separating the Italian Peninsula from the Balkan peninsula, and the system of the Apennine Mountains from that of the Dinaric Alps and adjacent ranges. The Adriatic Sea is a northwest-to-southeast arm of the Mediterranean Sea.
The western coast is Italian, while the eastern coast runs along Slovenia (47 km), Croatia (5,835 km) , Bosnia and Herzegovina (26 km), Montenegro (294 km), and Albania (295 km). Major rivers joining the Adriatic are the Reno, Po, Adige/Etsch, Brenta, Piave, Soča/Isonzo, Zrmanja, Krka, Cetina, Neretva, and Drin (Drini).