Take in the sites of Istanbul, visit the historic Blue Mosque and the Hippodrome, where Roman chariot races were held. Explore Hagia Sophia with Insight Choice. Choose between visiting Hagia Sophia History Digital Experience, offering an immersive journey through the landmarks marvels, or alternatively, visit Hagia Sophia, built in A.D. 537 and famous for its domed roof. Visit the Topkapi Palace, perched above the Bosphorus and the Golden Horn, the primary inlet of the waterway. Enjoy a relaxing cruise on the Bosphorus, where you will pass Ottoman palaces, old mansions and fortresses. In the evening, join your fellow travellers for dinner at a local restaurant.