Discover Zerostrasse: Pula’s Hidden Tunnels
We stumbled across Zerostrasse in Pula completely by accident, and what a discovery it was! On a hot summer day just after lunch, the cool tunnels felt like the perfect hideout from the blazing sun. Waddling inside, we were struck by the mix of history and engineering, thick stone walls, dimly lit corridors, and hidden passageways that once protected thousands. It’s not just a shady spot to escape the heat; the story behind the Austro-Hungarian tunnels makes it a stop worth taking, giving a fascinating glimpse into Pula’s secret past. So read on to learn why you should put it on the Pula itinerary.


Quick Facts About Zerostrasse in Pula
- Location: Beneath the hill of Kaštel, in the heart of Pula, Croatia
- Year Built: Early 20th century, during Austro-Hungarian rule (around 1916)
- Purpose: Constructed as a wartime shelter and defense system for civilians and naval personnel during World War I
- Depth Underground: Ranges from 5 to 10 meters below the city streets
- Length & Size: Extends for several hundred meters, with wide corridors spacious enough to walk comfortably
- Structure: Stone and brick tunnels with ventilation shafts and multiple entry/exit points around the city
- Current Use: Open to visitors for guided tours and cultural exhibitions
- Atmosphere: Cool, slightly eerie, and a stark contrast to sunny Pula above
- Significance: One of the best-preserved Austro-Hungarian military tunnels in the region
- Accessibility: Easy to explore on foot; portions have been restored for tourism
How to Get to Zerostrasse in Pula
📍 Address: Carrarina ul. 3, 52100, Pula, Croatia
The best way to reach Zerostrasse is on foot, giving you the chance to wander through the charming streets of Pula’s old town before descending into the cool underground tunnels. If you’re exploring the city by car, don’t worry, there are several parking options nearby. You can park at Parking Karolina Pula, close to the fortress, or use Parking Garage Centar Pula near the old town, both just a short waddle from the tunnel entrances. Once you’ve parked, follow the signs toward Kaštel hill ,and you’ll find the entrance to Zerostrasse, ready to transport you back to Pula’s Austro-Hungarian past.
Opening Hours and Tickets for Zerostrasse
Opening Hours
If you’re planning a visit to Zerostrasse in Pula, it’s good to know the opening hours.
- October – April: 9:00 – 17:00
- May – September: 9:00 – 21:00
Guided tours can be booked ahead by calling +385 52 211 566 or emailing [email protected], which is especially handy if you want extra insight into the tunnels’ history. Since hours and schedules can occasionally change, it’s always wise to check the official website before you go to make sure your visit goes smoothly.
Tickets
Visiting Zerostrasse is affordable and accessible for everyone.
Ticket Prices:
- Adults: 7,00 EUR
- Children (5–16 years): 3,00 EUR
- Groups (10+ people): 5,00 EUR per person
- Students & Seniors (65+): 3,00 EUR
- Children under 5 years: free entry
- Plushies: free entry
Paying for tickets is simple and convenient. You can use cash or major credit/debit cards. When we went, we bought our tickets right at the entrance, and the whole process was quick and hassle-free, no lines, no fuss, just a smooth start to exploring the tunnels. We used the self-service ticket machine, which was easy to navigate. And the machines are card-only. No cash. We also got a Combined ticket valid for Zerostrasse and Kaštel fortress.


Facilities and Amenities at Zerostrasse
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- Guided Tours: Knowledgeable guides available for detailed exploration of the tunnels
- Restrooms: Public toilets are available near the entrance
- Accessibility: Portions of the tunnels are accessible; free entry for persons with disabilities + assistant
- Seating Areas: Small resting spots inside certain sections of the tunnels
- Parking Nearby: Options like Parking Kaštel and Parking Gajeva are within a short walk
- Signage & Info Panels: Educational panels throughout the tunnels explaining history and structure
- Refreshments: Cafés and restaurants nearby in Pula’s old town
- Souvenir Shop: Small shop near the entrance offering local keepsakes and guidebooks
Our Waddle and Experience of Zerostrasse
As we mentioned earlier, we stumbled across Zerostrasse completely by accident, and the moment we reached the entrance, we could already feel the cool air wafting out from the tunnels, a perfect relief on a hot summer day. It was a yes from us to go inside and explore. The tunnels have several entrances and ways to access them, so you can pick the route that works best for your waddle through the old town. Zerostrasse has four different entrances that lead into the tunnel system beneath Kaštel hill. These passageways are on different sides of the hill. All connect to a central area, helping with airflow and making the tunnels easier to explore from several points in the city centre. We chose to enter near the Arch of the Sergii. Just a short stroll away, there’s another entrance, giving plenty of flexibility for exploring different sections. From the very first step inside, the combination of cool air, history, and mystery made it a completely captivating experience.




Walking through Zerostrasse feels like stepping into another world beneath Pula’s old town. The tunnels gently slope from a main central hall under Kaštel, with side rooms and alcoves that were once used for storage, shelters, and communication. Some chambers now host temporary exhibitions, like displays about Pula’s old tram system, while others are left bare, letting you soak in the unique atmosphere.




The tunnels are surprisingly spacious, 3 to 6 metres wide and around 2.5 metres high, and the cool air immediately hits you, a welcome relief on a hot day. Low lighting casts soft shadows and makes every echo of footsteps feel a little mysterious.
As we waddled through the tunnels, we first got a little lost, the twists and turns can be a bit confusing at first. But soon enough, we found our way and realized just how much there is to see. The passages are wide and spacious, with side rooms that invite you to pause and explore. In the middle of the tunnels, we came across informational signs that explained the history and purpose of different sections, adding context to the eerie, cool atmosphere. It was easy to get lost in time down there, with so many corners to peek around and stories hidden in every chamber.





Even though Zerostrasse is only a few hundred metres of tunnel open to visitors today, it’s actually part of a vast underground network that runs far deeper and wider beneath Pula than most people realize, so extensive that some locals call it a kind of “shadow city under Pula”. According to popular local lore, some older residents claim unmarked passageways once ran so deep and far that they could connect major landmarks like the Arena and other forts. However, no official archaeological evidence has ever confirmed them. Whether a complete myth or a hint of forgotten tunnels still waiting to be explored, it adds to the mysterious allure of Zerostrasse and Pula’s secretive subterranean world.




At the end, you can either return to the streets above or take the elevator up to Kaštel fortress (which we did), emerging into sunlight and enjoying sweeping views of the city, a perfect contrast to the underground calm.


How Much Time Do You Need in Zerostrasse
Exploring Zerostrasse doesn’t take an entire day, but it’s worth giving yourself enough time to really soak in the atmosphere. Most spend around 45 minutes to 1 hour waddling through the main tunnels, pausing at alcoves, side rooms, and informational signs. If you want to take your time, snap photos, or visit the small exhibitions along the way, budgeting up to 90 minutes makes for a relaxed experience. Either way, it’s a perfectly timed stop during a day of wandering Pula’s old town, giving you a cool, fascinating break from the sun above.
Best Time to Visit Zerostrasse
The best time to visit Zerostrasse is during the morning or early afternoon, especially in the hotter months. The tunnels offer a cool retreat from Pula’s summer sun, making midday visits particularly refreshing. If you prefer fewer crowds, arriving right when it opens gives you a quieter experience, letting you explore the passages and side chambers at your own pace. Visiting later in the afternoon is also nice, as the lighting inside the tunnels adds to the slightly mysterious, atmospheric vibe. Make sure to check closing times depending on the season.
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What to See Around Zerostrasse
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- Pula Arena: One of the best-preserved Roman amphitheaters in the world, just a short walk from the tunnels
- Arch of the Sergii: Ancient Roman triumphal arch located near one of Zerostrasse’s entrances
- Temple of Augustus: Stunning Roman temple in the heart of Pula’s old town
- Kaštel Fortress: Historic hilltop fortress offering panoramic views of the city and harbor
- Pula City Market: Early 20th-century iron-and-glass market hall with local produce and souvenirs
- Pula Forum: The main square surrounded by historic buildings and cafés, perfect for a stroll
- Verudela Lighthouse: A scenic viewpoint slightly south of the city, ideal for sunset photography
- Old Town Streets: Charming cobbled lanes full of history, restaurants, and hidden corners to explore
Stumbling across Zerostrasse completely by accident turned out to be one of the best surprises of our Pula trip. On a hot summer day, the cool tunnels were a perfect escape from the sun, and exploring the passages, alcoves, and hidden corners was fascinating from start to finish. It’s the kind of place you don’t expect to find while wandering the old town, but once you step inside, you realize just how much history and atmosphere it holds. If you’re in Pula, make sure to carve out a little time for this cool, hidden adventure; it’s totally worth it.
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