The fortress walls around the medieval Sozopol are building VI-XIV. In some places, defensive structures 5 meters high have been preserved, and their construction began even before our era. But most of all I liked the building with the inscription "Northern tower with access to the fortress of Sozopol". I got there by accident, walking through the city at night. It's a very romantic place, as evidenced by the occasional couples I've been passing along the way. By the way, right on the beach there is a wonderful restaurant overlooking the sea.→