The Princes' Islands, or simply known as Adalar, are a serene and picturesque archipelago located in the Sea of Marmara, just southeast of Istanbul, Turkey. Composed of nine inhabited islands, the most popular being Büyükada, Heybeliada, Kınalıada, and Burgazada, they offer a peaceful escape from the city’s hustle with their car-free streets, historic wooden mansions, and scenic landscapes.