Heracleum santicum
The Thracian tribes Sinti and Sintians used to inhabit the area of the present-day region of Petrich in antiquity. They lived south of the Maedi tribes.
Historical heritage
The fortress of Saumil
In the beginning of the ХІ century the Klyuch gorge was mentioned in the written sources in relation to the attempts of the Byzantine emperor Basil II to regain the territories on the Balkans.
