Kleines Berlin

Behind a modest entrance on a city street lies Kleine Berlin—the largest system of underground air-raid tunnels in the city of Trieste. This unique historical site, located in Italy, is an impressive labyrinth that served as a shelter during World War II.

Kleines Berlin. Иллюстрация. Источник: Kupi.com AI

The complex is divided into two parts: the Italian section, built for the civilian population, and the German section, which was used by the military as storage and headquarters. Today, it is a museum site where visitors can see authentic interiors, first aid rooms, and even natural stalactites and stalagmites that have formed over decades in the cool, damp underground chambers.

The original inscriptions and paintings on the walls, dating back more than 60 years, give "Kleine Berlin" its special historical value. There are two permanent exhibitions here: one dedicated to the events of World War II, and the second telling the story of the World War I tunnels in the Isonzo River area. This place is perfect for those who want to see the "other" Trieste, hidden deep beneath the cobblestones.

To inquire about visiting or to book a tour, you can use the following contact details:

The main reason to descend underground is for a guided tour. A walk through these somber yet fascinating tunnels allows for a complete immersion into the atmosphere of the past. You will walk through narrow corridors, see a massive spiral staircase, and peer into flooded rooms where water creates whimsical reflections on the old walls.

History buffs will be interested in exploring the two permanent exhibitions. Displays with photographs and documents tell the detailed story of air raids on the city and how the underground fortifications functioned. Special attention should be paid to the Italian sector, where evidence of the daily life of citizens who sought salvation here has been preserved.

In addition to historical facts, a visit to "Kleine Berlin" offers unique tactile and visual sensations: you will feel the coolness and dampness of the underground, hear the sound of dripping water in natural caves, and be able to see real stalactites. This is an adventure in the spirit of urban explorers, complemented by professional narration from enthusiast volunteers.

The attraction is conveniently located in the city center at Via Fabio Severo. The entrance to the tunnels is directly opposite building No. 11, near the majestic Palace of Justice (Tribunale). If you are in the center, the walk to the site takes very little time—the main tourist spots are within a radius of 800–1000 meters.

For those who prefer public transport, the Trieste city buses that stop in the Via Fabio Severo area are ideal. From the main city square or the Trieste Centrale railway station, you can walk there in just 10–15 minutes. Alternatively, taxis are always available to quickly take you to the entrance from any point in the city.

If your journey begins at Trieste Friuli Venezia Giulia Airport (TRS), the most convenient option is to take an express bus or a train to the central station, followed by a short walk. Please note that parking in this part of the city can be limited, so a walking route or using public transport will be the most comfortable options.

The history of this underground complex is inextricably linked to the events of the mid-20th century. The Italian part of the system was designed by city authorities as a public air-raid shelter to protect the civilian population. Inside were wooden benches, ventilation systems, and basic sanitary facilities, allowing people to endure air raids in relative safety.

The German section appeared later, after September 1943. It was built by the German army as a strategic facility, housing warehouses, storage rooms, and protected passages between important city buildings. It was the scale and complexity of this part of the complex that gave the site its name—"Kleine Berlin" (Little Berlin).

One of the most remarkable engineering features is a deep shaft with a spiral staircase, which connected the underground halls to surface structures. After the end of hostilities, the tunnels were sealed, which allowed them to be preserved to this day in almost pristine condition. Today, thanks to the efforts of volunteers, this site has become an important historical museum, serving as a reminder of the city's past.

Usually, a detailed visit to the Kleine Berlin complex takes about 2 hours. This time includes not only walking through the main tunnels accompanied by a guide but also viewing the themed exhibitions located inside the underground halls.

Since visits are conducted as part of organized groups, you should consider the tour schedule. To leisurely examine the original inscriptions on the walls and the unique natural formations in the cave section, we recommend planning your visit with a small time buffer before and after the tour.

The Kleine Berlin museum operates on a special schedule, so a visit should be planned in advance. Usually, the doors of the complex are open to visitors on Fridays. Standard time slots for tours are from 17:30 to 19:30, with a second session from 20:00 to 21:30.

Special attention should be paid to the last Friday of the month, when extended tours are held. Since the schedule may change or require pre-registration depending on the season, we strongly recommend checking the current opening hours on the official website before visiting.

Trieste is a city with a rich heritage, and exploring the surroundings of this underground landmark will allow you to better feel the atmosphere of different eras. Just a few minutes' walk from the tunnels are iconic architectural and cultural monuments.