Exploring Rijeka’s Hidden WWII Fortresses: An Honest Look at the Extended WW2 & Underground Tour

If you’re curious about Rijeka’s past beyond the usual sightseeing spots, this Discovering the Unknown Extended WW2 & Underground Tour might catch your interest. It’s a journey through military history, underground tunnels, and scenic viewpoints, all wrapped up with a relaxed social ending. We’ve looked into what travelers experience and what’s worth knowing before you book.
What really draws us to this tour are two things: first, the chance to go inside the underground fortress Katarina B, which is a rare peek into wartime defenses, and second, the opportunity to enjoy stunning panoramic views of the Rijeka area. On the flip side, one thing to keep in mind is that the underground parts can be quite cold and involve some walking over uneven surfaces. So, it’s best suited for those who are comfortable with a bit of adventure and don’t mind tight spaces. This tour aligns well with history buffs, outdoor lovers, or anyone interested in seeing Rijeka from a different angle.
You can check availability for your dates here:Key Points

- Historical depth: Focuses on WWII and military engineering, with visits to underground and above-ground fortresses
- Scenic views: Offers great vistas of the Rjeina River, old mills, and city landmarks
- Guided experience: Led by knowledgeable guides with good reviews for friendliness and expertise
- Unique underground tour: Walk through a 1000-meter-long bunker and learn about Rijeka’s battle for liberation
- Social finale: Wraps up with wine, a short film, and socializing in the fortress’s entrance hall
- Cost and inclusions: $76 per person, including transport, helmets, guide, and wine tasting
What the Tour Entails: A Deep Dive

Starting Off: Transport and First Stops
The tour begins in Rijeka’s city center, with organized van transport that takes you along roads with names like Louisiana and Petroleum — a hint at Rijeka’s storied past and strategic importance. This ride is comfortable and efficient, setting the tone for a day that mixes history and scenic beauty.
Your guides, who are certified professionals, are praised for their knowledge and friendly manner. They’ll provide context as you pass through important locations such as Banska Vrata and the Paac Bridge. These spots aren’t just photo ops; they are strategic points that played roles in Rijeka’s defenses and wartime movements. As one reviewer pointed out, the natural surroundings during the drive are beautiful, and the views from these elevated points are rewarding for anyone who loves a good panorama.
Walking Through History
The main highlight is the walk through the underground fortress Katarina B. It’s a 1000-meter-long tunnel system that once served as part of Rijeka’s defensive network built in the 1930s. This part of the tour is quite tangible — you’ll go through narrow corridors, climb stairs, and see the rusted, metal-studded walls that carry the weight of history.
Visitors note that inside the bunker, the temperature hovers around 14°C, so bringing a warmer layer is recommended. The atmosphere is somewhat raw and authentic, not sanitized for travelers, which is part of its charm. Be aware that the experience involves walking on easy hiking trails, and there might be insects flying around, which some found surprising or distracting, but not dangerous.
More Great Tours NearbyThe Battle of Rijeka and Its Stories
As you walk through the tunnels, your guide will tell you about the Battle of Rijeka, a pivotal event during WWII when forces fought for the city’s liberation. The story is well told, and many reviewers found the explanations engaging. One traveler mentioned that the guide shared detailed insights and made the experience enjoyable, even adding some lighthearted moments.
Above-Ground Fortresses and Views
After exploring the tunnels, the route continues above ground, where you’ll visit other fortresses and vantage points. These locations offer spectacular views of the Rjeina River canyon and the old mills, which are part of Rijeka’s industrial past. From these overlooks, you’ll get a bird’s-eye perspective of the landscape, perfect for photography or just soaking in the scenery.
End of the Tour: The Fortress San Giovanni and Social Time
The tour concludes at the unfinished underground fortress San Giovanni, an atmospheric site that sets the perfect scene for unwinding. Here, you’re invited to socialize over a glass of Croatian wine, and a short film about Rijeka’s post-war reconstruction is screened.
One reviewer described this ending as a “fantastic place to enjoy a glass of wine”, emphasizing the relaxed, friendly atmosphere. The combination of history, views, and a casual social setting makes for a memorable finish.
How Good Is the Value?

At $76 per person, this tour offers a comprehensive package: transport, guided commentary, access to underground fortresses, helmets, headlamps, and wine tasting. Reviewers generally agree that the cost is justified, especially considering the detailed storytelling and exclusive access to sites that aren’t open to everyone.
Some found it a bit underwhelming if they expected something more dramatic or elaborate. For example, one reviewer mentioned that the first bunker was just a concrete corridor with no evident wartime features, and felt that the natural surroundings and scenery made the trip more appealing than the military sites themselves. But overall, the combination of sights, history, and socializing seems to deliver a good balance for many visitors.
Considerations for Visitors
- The underground sections are not suitable for those with claustrophobia or epileptic seizures.
- Bring warm clothes and sturdy footwear, as the underground temperature is low and surfaces uneven.
- The tour is approximately a few hours long, making it a manageable half-day activity.
- It’s not recommended for children under 10 or seniors over 70, mainly due to walking and space constraints.
- You might find it particularly interesting if you enjoy history, military structures, or scenic viewpoints.
Who Is This Tour Best For?

This experience is perfect for history buffs, outdoor explorers, and those interested in WWII or military architecture. If you’re looking for a unique way to learn about Rijeka’s past beyond typical city tours, this delivers on that front. It also suits travelers who appreciate a bit of adventure—walking through tunnels and climbing stairs—combined with some relaxing social time.
It’s less ideal if you prefer a fast-paced or family-oriented experience, or if you’re looking for something more glamorous or luxurious. The focus is on authenticity and storytelling, and it’s best enjoyed by those open to authentic, sometimes raw, historical sites.
FAQs

Is this tour suitable for children?
It’s not recommended for children under 10 due to the walking, stairs, and underground environment. The tour involves some physical activity and exposure to uneven surfaces.
How long does the tour last?
The tour itself takes a few hours, with a scenic drive, underground walk, and socializing at the end. Exact timing can vary, but plan for around 3-4 hours.
What should I bring?
Warm clothes, sturdy footwear (hiking shoes or sneakers), and possibly a small flashlight if you want extra light. The underground temperature is around 14°C.
Is the tour physically demanding?
Not extremely, but the underground parts involve walking on trails, climbing stairs, and navigating tight spaces, so some mobility is helpful.
What makes this different from other Rijeka tours?
This tour focuses on military history and underground fortresses, with the added experience of exploring hidden tunnels and enjoying scenic views that you can’t get from typical city walks.
Is there a social element?
Yes, the tour ends with socializing over wine and a short film, creating a relaxed atmosphere to reflect on the experience.
Can I book a private tour?
Absolutely. Private tours and other arrangements are available upon request via WhatsApp, offering flexibility if you prefer a more tailored experience.
Final Thoughts

If you’re searching for an authentic, immersive look at Rijeka’s wartime defenses and enjoy a bit of scenic beauty along the way, this extended WW2 underground tour offers a solid experience. It’s a blend of history, nature, and social charm, all wrapped up in a manageable package perfect for curious travelers.
While it might not satisfy those expecting grandiose war museums or highly dramatic sites, it compensates with its unique underground tunnels and stunning views. The knowledgeable guides, relaxed vibe, and added wine tasting make it a memorable outing for those keen on discovering Rijeka’s lesser-known stories.
This tour clearly appeals most to those with an interest in military structures, outdoor exploration, or simply looking for an off-the-beaten-path experience with authentic local flavor. If that sounds like you, it’s worth considering for your Rijeka visit.
DISCOVERING THE UNKNOWN Extended WW2&UNDERGROUND tour
“We thoroughly enjoyed our tour. Josep was very knowledgeable about the war and other topics. We had a pleasant conversation throughout the tour, wh…”
Source:

https://www.getyourguide.com/rijeka-l2041/discovering-history-of-military-forts-and-battles-t487185/
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