Türkiye is the kind of place where a single week can hold a lot. Istanbul alone drifts from Byzantine cisterns to ferry-dotted Bosphorus evenings to street-side simit and çay, and once you've had a day there the coast pulls you: the Aegean town of Bodrum, the cliffside ruins above Fethiye, the long sandy stretch at Antalya. Food is the throughline — mezes, fresh fish, grilled meats, baklava that's actually worth the reputation — and your dollar stretches further than it does in Western Europe.
Timing matters more than people think. April through June and September give you warm-enough weather without the July–August crush, when European and Gulf travelers fill the hotels and prices climb. Shoulder season means shorter lines at Hagia Sophia, easier restaurant reservations, and ferry schedules that actually run on time.
The 18-month 0% intro on the Citi Simplicity card is a payment timeline, not a discount — there's no interest during the window, but anything still on the balance after month 18 starts accruing at the card's regular APR. If life gets in the way and the $720 isn't fully paid off in time, pay down the remaining balance as fast as you can to limit the interest charge.