Rab Island is one of the most densely wooded islands in the Adriatic and is a botanical exhibition. The Komrcar Park, with its diversity of trees, is now the pride of Rab. Its more than 300 freshwater springs helped Rab be known as one of the greenest islands in the Adriatic. This principal town is walled and has three parallel main streets built on a steep promontory along the west coast. At the south end is a 13th-century Romanesque cathedral – the first in a line of four bell towers on a ridge dominating the old town. The town with its typical, twisting and narrow Mediterranean streets preserves many monuments of art; medieval churches, the Loggia, Venetian patrician palaces with beautiful doorways.