The Lower Trajan's Wall (Vadul-lui-Isac - Kunduk), located in the South of the Republic of Moldova, is part of the ramparts of ancient Roman Danube embankment, as are Brazda lui Novac, Stoicani-Ploscuteni rampart, Troianul Muntean (limes Transalutanus), the latter being placed on the territory of Romania. These constructions, which emerged in the II - IV centuries AD due to the economic and political interests of the Roman Empire and served more as demarcation lines of the territory than fortifications for active defense. Even now, they surprise us by their great character. In the years that passed after the edification of the Rampart, a natural pedoecological complex was formed here, which functions according to biogeocenotic regularities. Each element of this ensemble is of particular interest. On the surface of the rampart’s embankment (it is a sector of the Rampart situated on the watershed with a quasi-horizontal surface and auto-morph conditions of forming the hydrological regime), certain ecopedological conditions were created characterized by a lesser moisture regime than on the mainland and, accordingly, a poor vegetation cover, represented by species characteristic for dry and ruderal places. It is natural that the soil, that was formed here, has evolved in a weaker way. A completely different picture appears in the adjacent ditch where the hydrothermal regime is more favorable than on the main one, which manifests itself through an abundant vegetation characteristic of meadows. An oakery appeared in more suitable places. A deeply evolved cumulative strong ground formed here. Such a contrast character of natural conditions that was created on the surface of the embankment and the adjacent ditch is due to the role of the relief - a factor that has caused uneven redistribution of temperature and humidity.