The Bay of Kotor is not a fjord — tectonic collision and karst erosion carved its 28-kilometre serpentine channel, but no glacier touched the Adriatic here. The confusion persists because limestone cliffs rise 1,200 metres almost vertically from the waterline, mimicking Scandinavian topography at Mediterranean latitude. Medieval Venetian traders fortified every navigable curve: Kotor's 4.5 kilometres of ramparts date to the ninth century, Perast built seventeen Baroque palaces for maritime families who never numbered more than 400 souls, and the artificial island of Our Lady of the Rocks began as a fifteenth-century votive reef where sailors sank captured Ottoman ships filled with stone. A Dubrovnik boat tour to Montenegro navigates the same channel that separated the Habsburg crownlands from Ottoman Albania for four centuries. The 1815 Congress of Vienna awarded Kotor to Austria; Tito's Yugoslavia reunified the bay in 1945; Montenegrin independence in 2006 revived the international border that now requires passport control at the midpoint of most Adriatic crossings. Early-morning departures from Dubrovnik's Gruž harbour reach Montenegrin waters within ninety minutes, arriving at Perast before the midday heat crowds the Church of Our Lady of the Rocks — the only building on the man-made island, its votive silver collection still growing as sailors leave ex-voto plaques after surviving Bora gales. Kotor itself occupies an inner bay corner where the Škurda River once powered grain mills; its Old Town compresses 2.5 square kilometres of Romanesque churches, Renaissance fountains, and 1,350 steps ascending to the San Giovanni fortress. The Austrians paved those steps in 1884 to link the naval stronghold with the summit telegraph station. UNESCO World Heritage designation arrived in 1979, two years before the Montenegrin earthquake fractured façades across the bay — restoration work continues on the Cathedral of Saint Tryphon, whose twelfth-century Romanesque core now wears eighteenth-century Baroque towers. Budva, the third stop on extended Montenegro tours, claims 2,500 years of continuous settlement; Illyrian, Greek, Roman, Slavic, and Venetian layers remain legible in the Stari Grad's 425-metre perimeter wall.