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Explore Rijeka’s underground WWII fortresses and historic sites with guided tours, stunning views, and a touch of Croatian history, all at a great value.

If you’re a history buff, a lover of military architecture, or just curious about Croatia’s lesser-known stories, the WW2&UNDERGROUND discovering the unknown EXTENDED TOUR promises a fascinating journey into Rijeka’s past. This three-hour adventure takes you beyond the usual sightseeing, revealing the secrets of underground fortresses, strategic military sites, and the city’s wartime resilience. What makes this tour truly special is the combination of immersive underground exploration, breathtaking vantage points, and insightful storytelling by passionate guides.
One of my favorite aspects is how the tour balances history with scenic views—you’re not just stuck inside tunnels but also enjoying panoramic cityscapes and river canyon vistas. However, a potential consideration is the physical nature of some parts of the tour, like walking through underground tunnels, which might be less suitable for those with claustrophobia or mobility issues. This experience suits history enthusiasts, active travelers, and curious visitors eager to see Rijeka from a different perspective.
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The tour begins in the central part of Rijeka, at Ulica Rade Upića, an easy-to-reach location via public transportation. From there, the guide takes you on a leisurely drive along historically significant roads such as Louisiana and Petroleum streets. This not only sets the scene but adds a layer of context for those interested in military logistics and urban development during wartime.
The tour is priced at $71.94 per person, reflecting a good value considering the inclusion of transportation, entrance fees, helmets, headlamps, wine, and multimedia experiences. Booking in advance—typically around 46 days ahead on average—ensures availability, and the small group size (up to 8 people) promises a more intimate experience.
1. Scenic Drive and Key Landmarks:
The journey starts with a drive past Banska vrata and the bridge Paac, historic sites with stories rooted in Rijeka’s wartime defenses. These stops are more than just photo ops—they offer insight into the city’s strategic importance and how the terrain influenced military planning. From these viewpoints, you get a birds-eye view of Rijeka, which is a bonus for those who love panoramic cityscapes.
2. Underground Fortress Katarina B:
The crown jewel of this tour is exploring the 1000-meter-long underground fortress Katarina B, built in the 1930s as part of Rijeka’s defense system. The tunnels are equipped with helmets and headlamps, ensuring safety while giving you a real sense of what soldiers faced. The guides provide lively commentary on the Battle of Rijeka, highlighting how these structures played roles in the city’s liberation during WWII. Reviewers describe this part as “truly fascinating” and “a highlight of the tour,” emphasizing the impressive construction and historical significance.
3. Above-Ground Fortresses and Scenic Trails:
After the tunnels, your walk continues along an easy hiking trail, visiting above-ground remnants of other fortresses, including the scenic Rjeina river canyon and old mills. These sites are more than just ruins; they are windows into local history and engineering. The views here are lauded as “great” and “suggestive,” perfect for photography or just soaking in the quiet beauty of the Croatian landscape.
4. The Unfinished San Giovanni Fortress and Cultural Finish:
The tour culminates at the unfinished underground fortress San Giovanni. Here, the atmosphere shifts from military history to cultural reflection, with an opportunity to socialize over a glass of Croatian wine and watch a short film about Rijeka’s post-WWII restoration. Several reviewers appreciated this personal touch, noting it added depth and warmth to the experience.
The combination of underground tunnels, above-ground fortresses, and scenic vistas makes this tour well-rounded. The guides’ enthusiasm and knowledge truly shine through, making complex historical topics accessible and engaging. Reviewers like “Josip” and “Sarah” praise the guides for their friendly manner and in-depth explanations, which enhance the experience without feeling rushed.
The multimedia aspect, including audio-visual effects and projections, enriches the storytelling. The inclusion of helmets and headlamps ensures safety and immersion, helping you feel like a soldier or explorer rather than just a tourist. The wine tasting at the end adds a relaxed, social vibe, letting you reflect on what you’ve learned.
The underground parts of the tour maintain a temperature of around 14°C, so packing a warmer layer is advised, especially if you’re sensitive to cooler environments. The entire experience is accessible to most travelers, except those with severe claustrophobia or certain health conditions like epileptic seizures. The group is small, which is ideal for personalized attention and a more relaxed atmosphere.
Transportation is included from the start point, and the tour runs daily from 9:30 am to 5:30 pm, offering flexibility for planning your day. The 3-hour duration makes it manageable even for those with tight schedules but is packed with enough content to feel satisfying.

Reviewers consistently mention the knowledgeability and enthusiasm of guides. One reviewer noted how they appreciated the “relaxed and friendly” presentation style of Josip, which made complex historical details more digestible. Others praised the unique locations, especially the underground tunnels and the scenic trail, which are not usually included in typical city tours.
The wine tasting and the short film about Rijeka’s post-war renewal** add a cultural and emotional layer to the experience, transforming it from a mere sightseeing tour into a storytelling session that connects you to the city’s soul.
Considering the price, travelers get more than just an overview of Rijeka’s WWII history—they gain access to hidden underground networks, enjoy beautiful natural scenery, and participate in a cultural activity with wine. The small group size enhances intimacy, which many reviews highlight as a significant plus.

This experience is ideal for history lovers, especially those interested in military architecture or WWII. It’s equally suited for active travelers comfortable walking and exploring tunnels and scenic trails. If you’re after authentic, off-the-beaten-path sites and enjoy storytelling, this tour offers a compelling mix. However, those prone to claustrophobia or with mobility challenges should consider their comfort level before booking.

The WW2&UNDERGROUND discovering the unknown EXTENDED TOUR in Rijeka offers a thoughtful blend of history, scenery, and cultural insights. From exploring impressive underground fortresses to enjoying panoramic vistas and tasting Croatian wine, this tour delivers a well-rounded, memorable experience. It’s especially valuable for travelers who crave depth beyond surface-level sightseeing and like their history served with a side of natural beauty.
Guided by passionate, knowledgeable hosts, you’ll walk away with a clearer understanding of Rijeka’s strategic importance during WWII, coupled with stunning views and a warm, social finish. Given its affordability, personalized attention, and unique locations, this tour provides excellent value for anyone interested in Croatia’s military past and scenic landscapes.
Whether you’re visiting Rijeka for a day or planning a longer stay, this tour is a genuine highlight that will enhance your appreciation of the city’s layered history and rugged charm.

Is this tour suitable for children or families?
This tour is generally suitable for most travelers, but because it involves walking and underground tunnels at 14°C, it’s best for older children and adults comfortable with these environments. Small groups and active exploration make it engaging but not overly strenuous.
How long does the tour last?
The entire experience takes approximately 3 hours, including transportation, exploration, and socializing. It’s well-paced for a half-day activity.
What should I wear?
Bring warm clothes, especially for underground sections where temperatures hover around 14°C. Good walking shoes are recommended for the trails and uneven surfaces.
Are helmets and headlamps provided?
Yes, helmets and headlamps are included, ensuring safety and immersion during the underground walk.
Does the tour include entrance fees?
Yes, entrance to underground forts and other sites is part of the package.
Is there a chance to see the entire city of Rijeka?
The tour offers a bird’s-eye view of Rijeka from key vantage points, as well as a scenic drive through historic roads, but it’s primarily focused on WWII sites and military architecture rather than general city sightseeing.
Can I book this tour privately?
Yes, private tours are available upon request, which can be tailored to your preferences.
What if I need to cancel?
Cancellation is free if made at least 24 hours in advance. Cancellations within 24 hours are not refundable, so plan accordingly to avoid disappointment.
This tour blends history, scenery, and culture into a compact, engaging experience that reveals a lesser-known side of Rijeka. Perfect for curious minds and adventure seekers alike, it invites you to walk through history—literally—while enjoying stunning vistas and a relaxed Croatian vibe.