Kerkini is an artificial lake formed in 1932 with the creation of a dam on the river Strymon. In 1982, due to the reduction of the lake's capacity due to the sludge from Strymon, a new barrier was built. The extent of the lake varies from 54,250 to 72,110 acres depending on the season

Nowadays, Rupel works more like a historic monument where everyone can visit and with the guided tours they will be able to get to know a piece of the fort. The visitor of the fortress will be able to reach Rupel from the road of Sidirokastro - Promachonas and before the Customs of the Promahonas will turn right, where the bust of Ioannis Metaxas is in a white marble hero.

From the village of Chrysochorapa you head towards the lake of Limni and as you get there you are headed towards the village of Lithotopos. We followed this route with the Jimny 4x4 that we had at our disposal and it is frankly fantastic. Do not miss it with nothing! We passed the farm with the Vuvalia, we gazed at the Lake from above, passed through the improvised fishermen's huts, got friends with his fisherman, and also made us the table. Χρυσοχώραφα - Μεγαλοχώρι. Ακριβώς αντίθετη διαδρομή από τη πρώτη, ξεκινάς μεν πάλι από τα Χρυσοχώραφα μέχρι να βρεις το ανάχωμα αλλά μετά κατευθείνεσαι βόρεια προς το χωριό Μεγαλοχώρι, φτάνεις το δέλτα του Στρυμώνα στη Λίμνη και περνάς πάνω από το ποταμό μέχρι να φτάσεις στη Βυρώνεια. Την διαδρομή αυτή δεν την κάναμε γιατί ήταν χειμώνας και τα νερά στο βόρειο κομμάτι υποχωρούν κατα πολύ. Αν επισκεφθείτε τη περιοχή άνοιξη ή καλοκαίρι τότε θα μπορέσετε να την απολαύσετε καλύτερα γιατί προς αυτή τη κατεύθυνση θα βρείτε βουβάλια, το σκηνικό της ταινίας του Αγγελόπουλου από το “Λιβάδι που Δακρύζει”, ίσως τα φλαμένγκο καθώς και θα απολαύσετε την χλωρίδα και την πανίδα του δέλτα του Στρυμώνα στη λίμνη.

We start our small excursions in the Prefecture, with our home, Lake Kerkini. It is located at the northwest tip of N. Serres at a distance of about 100 kilometers from the city of Thessaloniki, about 40 from the border of Promahonas. An ancient habitat that received intervention in 1932 for irrigation needs. It is framed by riparian forests and dense forests creating a landscape of unique natural beauty. It is a survival shelter for many bird species, many of which are extinct or are now in very small populations. .

There is also this route on the west side of Lake. Begin from the village of Kerkini, head to the embankment and follow it until you reach the next village, Livadia. We did not do this route, but if you have done it, write down your experience below, to inform the rest. There is no mound on the road that connects Lithotopos with the village of Kerkini, but along the way you will notice the towers-observatories on your right or left where you can climb and gaze at the lake or make a nick nick. Make sure to make one of three! It's an experience! I sign you!

What was the fortress? The fortification is essential for a strong defensive location. By Fort was meant a set of surface and underground works, made of reinforced concrete (reinforced concrete), connected by underground arcades and constituting a single set. The purpose of the forts was to prevent the passage of enemy sections from important routes for as long as possible. The surface works, called active shelters, were intended for the protection of fire and observation means.