The closest is Koz Castle, 44 km north-west of the city centre; the most famous is Citadel of Aleppo (#310 of 9,035 worldwide) 56 km north-east. The oldest dated site in the circle is Royal Palace of Ugarit, founded c. 1450 BC.
The 100 km circle reaches into 2 countries: Syria (14), Turkey (3).
