Old Town of Warsaw is ringed by sections of old defensive city walls. It is pretty big portion as for the European capital. Construction of the walls began in the first half of the 14th century. Works were continued until the mid-16th century.

The medieval city walls were built during the 14th century and extended further in the 15th century. Forming a double circle around the Stare Miasto district, Warsaw's City Walls remain in a remarkable state of repair and even feature a number of fortifications and gateways, such as the Krakowska and the Nowomiejska. A particularly prominent stretch is located to one side of the Castle Square (Plac Zamkowy) and leads towards the castle itself. Look on the ground of the square for further traces of this structure.

It is possible to walk along the walls through the special trail running between the inner and outer lines. In the outer circle of walls there is a famous monument to the Little Insurgent. It symbolizes heroic fights of young people during the Warsaw Uprising in 1944. It is a boy with a machine gun in hand and a helmet which is too large for him.