Modlin fortress – 40 kilometres outside Warsaw. It is one of the largest and best preserved fortresses in Poland and a unique one in Europe. The Modlin fortress was built in 1806 on the command of Napoleon Bonaparte. Its location, where rivers Vistula, Narew and Wkra meet, made it a strategic and important military position for the years to follow. Today, apart from being open to the public, Modlin holds various trainings, museum lectures and open-air events.