4-Day Istanbul City Stay Package. Discover the delights of Istanbul on this 4-day Istanbul city stay package. Admire the Blue Mosque’s towering minarets and visit the 6th-century Hagia Sophia Museum. Explore top city attractions including Topkapi Palace, widely considered the jewel in the crown of the Ottoman Empire. Wander through the Grand Bazaar, where shoppers and traders hustle for bargains the way they have since the 14th century. Enjoy free time to explore at your leisure, and choose a 3-, 4- or 4-star superior hotel package during your stay. Book this Tour and Save 20%: 4-Day Istanbul City Stay Package.