The Kleine Berlin is a group of tunnels built by the German army during the Second World War.

The air-raid shelter called Kleine Berlin, which today can be visited, is made up of a public air-raid tunnel for civilians and of a German military air-raid shelter, consisting of a main tunnel and of side branches.

One of them, in its turn, features a well that, in that period, was provided with a spiral staircase and was used by SS Officer Globocnick to go from his house to the Palace of Justice.

Inside the Kleine Berlin complex everything has remained as it was: the walls, for instance, still feature the painting of over sixty years ago.

The water that continuously drips on the floor will let you understand how the people who hid there during the air raids felt.

Particularly charming is also the visit to the Italian Tunnel next to the Kleine Berlin, which was the shelter of the inhabitants of Trieste.

The Kleine Berlin features two permanent exhibitions: the first concerns the air raids in Trieste during the Second World War and the second concerns the natural and artificial tunnels made by the armies who fought on the low Isonzo front during the First World War.