The hook
The only city that straddles two continents, capital of two great empires in turn, where a fifteen-hundred-year-old former cathedral, imperial mosques, and a labyrinthine bazaar crowd the hills above the Bosphorus.
01Why it's worth it
Istanbul was Byzantium, then Constantinople, then the Ottoman capital, and it carries all of that at once. Its centrepiece, the Hagia Sophia, was built as the greatest church in Christendom in the 6th century, became a mosque after 1453, then a museum, and is a working mosque again, its vast dome and gold mosaics still staggering. Around it stand the Blue Mosque, the sprawling Topkapı palace of the sultans, the sunken Roman cistern, and the covered maze of the Grand Bazaar. But the city is more than monuments: it is defined by the Bosphorus, the strait dividing Europe from Asia, alive with ferries, fishermen, and tea, and by neighbourhoods that range from touristy to intensely local. It is big, hilly, and overwhelming, and it rewards both the sightseer and the wanderer.
02How to experience it
Do the big monuments of Sultanahmet early, then get out of the tourist core: ride a commuter ferry up the Bosphorus or over to the Asian side, wander Balat's painted lanes, and drink tea where locals do. Give the Grand and Spice bazaars an hour, and eat constantly, from street simit to a proper meze dinner.
From the locals
The affection runs deep — "Istanbul is probably my favourite place in the world," one traveller wrote — but the advice that recurs is to cross the water: "take the ferry over to the Asian side and spend at least an afternoon over there. Far fewer tourists and cheaper food." Regulars push past the headline sights to Sahaflar Çarşısı (the book bazaar), the Museum of Innocence, and Pierre Loti Hill, and swear by an İstanbulkart for the ferries.
The honest counterweight is the hustle, and it's specific: "the thing to look out for is scams. Avoid the shoeshiners — don't pick up their brush if they drop it, it's a scam. Happened to me four times." Another warns that anyone approaching you at an ATM should be assumed to be working an angle. None of it stops people calling the city their favourite; it just means walking through it awake.