Istanbul was the city with the most international arrivals in 2023. Istanbul, Turkey was the No. 1 city for international arrivals in 2023. The city saw a whopping 20.2 million visitors in 2023 — a 26% growth from 2022 to 2023 — according to the report. The historical center of Istanbul is a UNESCO World Heritage Site. It is home to several buildings and structures, such as the Hagia Sophia,...