Миколаївська область (Mykolaiv Oblast) is located in the center of the country, and has some Black Sea coastline. It is dominated by coastal plain (Black Sea Lowland) and river estuaries, like Dnjepr and Bog river. It is a plain which gently slopes in southern direction. The high groundwater level makes underground structures, even artificial more or less impossible. Only at the northern border there are spurs of Podolian and Dnieper uplands. The only underground site we have listed is located here.