Istanbul is the only city in the world that straddles Europe and Asia, with the Bosphorus Strait running through it, blending Byzantine and Ottoman civilisations. Must-visit sites include Hagia Sophia (a millennium-old architectural marvel), the Blue Mosque (exquisite tile art), Topkapi Palace (imperial treasure), the Grand Bazaar (the world's largest indoor market), Galata Tower (panoramic city views), and the Basilica Cistern (mysterious film location). Culinary highlights: Balık Ekmek (grilled fish sandwich at Eminönü Pier), Döner kebab, Baklava, Turkish delight, Manti (Turkish dumplings), a fusion of Eurasian flavours.