Its well-preserved medieval towns of Kotor, Risan, Tivat, Perast, Prčanj and Herceg Novi, along with their natural surroundings, are major tourist attractions. Natural and Culturo-Historical Region of Kotor has been a World Heritage Site since 1979. Its numerous Orthodox and Catholic churches and monasteries make it a major pilgrimage site. The bay is about 28 km long with a shoreline extending 10
7.3 km. It is surrounded by two massifs of the Dinaric Alps: the Orjen mountains to the west, and the Lovćen mountains to the east. The narrowest section of the bay, the 2300 m long Verige Strait, is only 340 m wide at its narrowest point.[1] The bay is a ria of the vanished Bokelj River that used to run from the high mountain plateaus of Mount Orjen. The bay is composed of several smaller broad bays, united by narrower channels. The bay inlet was formerly a river system. Tectonic and karstification processes led to the disintegration of this river. After heavy rains the waterfall of Sopot spring at Risan appears, and Škurda, another well-known spring runs through a canyon from Lovćen. The outermost part of the bay is the Bay of Tivat (Teodo). On the seaward side is the Bay of Herceg Novi (Castelnuovo), at the main entrance to the Bay of Kotor. The inner bays are the Bay of Risan to the northwest and the Bay of Kotor to the southeast. The Verige Strait represents the bay's narrowest section and is located between Cape St. Nedjelja and Cape Opatovo; it separates the inner bay east of the strait from the Bay of Tivat.