Zbruch River
The Dniester and the Seret were the main rivers. Border with the Soviet Union was marked by the Zbruch River, along its whole course. Border of the Voivodeship (and at the same time – of Poland) with Romania was marked by the Dniester. The south-easternmost place was the famous Polish stronghold Okopy Swietej Trojcy (Ramparts of the Hole Trinity), which for some time was protecting Poland from the invasions of the Turks and the Tartars.