Sigma Plan As a controlled flood area, they catch the Polders van Kruibeke Scheldewater during extremely high water levels. De Scheldedijk received a new function as a floodable dike. The eight kilometers of water barrier were lowered. A ring dike of 6 kilometers protects the villages behind it against incoming water during storm tides. Inflow structures ensure that Scheldt water can enter the area even under normal conditions. The outflow pipes lead the water back into the Scheldt at low tide. This creates a delicate tidal nature. The former dikes of the Barbierbeek have been preserved and remind us of the historical division of the polders of Kruibeke, Bazel, and Rupelmonde. These dikes form the border between the tidal nature in the north and the mix of tidal nature, meadow bird area, and alder carr forests in the south. Fort Liefkenshoek. From war fort to experience center We find ourselves at the end of the 16th century, when Antwerp comes under pressure. The port is in danger and the Spanish troops of Farnese are advancing. The answer to this threat was Fort Liefkenshoek, a strategic defensive point along the State-Spaanse Linies. The fort was built around 1810-1811, when Napoleon expanded his influence over Europe. The imposing structure changed owners several times and has found its definitive place as heritage for all of us.