Croatia is a former Yugoslav republic on the Adriatic Sea. It is about the size of West Virginia. Part of Croatia is a barren, rocky region lying in the Dinaric Alps. The Zagorje region north of the capital, Zagreb, is a land of rolling hills, and the fertile agricultural region of the Pannonian Plain is bordered by the Drava, Danube, and Sava Rivers in the east. Over one-third of Croatia is forested.