Hidden place · Thessaloniki, Greece
Heptapyrgion Fortress
This medieval fortress stands above Thessaloniki on the city’s acropolis. The Greeks later converted it into a prison, which remained open until 1989.
Hidden place · Thessaloniki, Greece
This medieval fortress stands above Thessaloniki on the city’s acropolis. The Greeks later converted it into a prison, which remained open until 1989.
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