Twierdza Modlin

Modlin Fortress is unique in the world – the longest building in Europe and the second longest in the world. This spectacular fortress is located in the very heart of Poland, at the confluence of two rivers: the Vistula and the Narew, in the immediate vicinity of picturesque sandy beaches hidden among forests and the phenomenal ruins of a historic granary. It is an excellent example of defensive architecture, the largest of its kind in Poland and one of the largest in Europe.