One of the best preserved medieval towns of the Adriatic, Kotor is protected by UNESCO. Between 1420 and 1797, the area was under the rule of the Republic of Venice and the Venetian influence can be seen in its architecture. The Gulf of Kotor is sometimes called the southernmost fjord in Europe, although it is actually a submerged river canyon. The overhanging limestone cliffs of Orjen and Lovcen complete one of the Mediterranean's most beautiful landscapes.