The Bay of Kotor is undoubtedly one of the most beautiful bays in the world. High mountains encircle the bay and are reflected in the deep blue waters of the Adriatic Sea. Seven islands decorate the Bay of Kotor, adding intrigue. The road hugging the Bay of Kotor passes though a chain of villages, many of which are rich in cultural heritage. Risan is the oldest settlement in the Kotor Bay, and has Roman mosaics dating back to the 3rd century. Kotor and Perast are beautifully preserved medieval towns, classified by UNESCO as world heritage sites.