Please Guess My City

The document provides clues to guess the city located 403 km from Ankara, Turkey. It mentions the country is Turkey and its capital is Ankara. It then lists three cities - Antalya, Izmir, and Samsun - and instructs the reader to use Google Maps to measure the distance from Ankara to each city to deduce which one is 403 km away, which is the mystery city the author is asking the reader to guess.