While most tourists photograph the famous St. Nicholas Fortress at the entrance to the Šibenik channel, true adventurers know that the Adriatic hides much more. Scattered across the islands of the Šibenik archipelago, four forgotten fortifications await those who are ready to grab a paddle and sail beyond the usual routes. This isn't a story about air-conditioned museums – this is a story about ruins overgrown with maquis, about walls that watched Venetian galleys, and about paddling through a sea that still keeps secrets.
Why Kayak? Why These Fortresses?
I could tell you that paddling is environmentally friendly or that it provides excellent exercise. But the truth is simpler: some places simply cannot be reached any other way. Ferry lines don't dock at the cliffs where the Venetians built watchtowers, and private charters charge prices that hurt. A kayak gives you freedom – you dock where you want, stay as long as you like, and you're the only visitor that day.
The Šibenik archipelago is ideal for this kind of exploration. The islands are close enough to each other that you can plan day trips or multi-day tours, the sea is relatively protected from strong waves, and each fortress has its own story dating back to times when this channel was the key to controlling navigation on the Adriatic.
1. The Small Fortress on Kaprije: Guardian Over the Žirje Channel
On the northern cape of Kaprije island, where the island bares its teeth toward the open sea, stand the remains of a 16th-century Venetian watchtower. Locals simply call it "Forteca," and it's reached by a goat path from the village of Kaprije – or twenty minutes of paddling from Nozdra bay if you've anchored there.
Practical paddling information:
- Starting point: Kaprije harbor or Nozdra bay
- Distance: 1.5 km from the harbor, 800 m from Nozdra
- Access difficulty: Medium – you need to pull the kayak onto a rocky shore
- Best time of day: Early morning, before the maestral wind
The fortress itself isn't large – it's a watchtower measuring approximately 8x6 meters with tower remains. But the view is breathtaking. You can see the Kornati islands, Žirje, and even Dugi Otok on a clear day. The Venetians knew what they were doing when they chose this location.
Local tip: There's no organized kayak rental on Kaprije, so bring equipment from Šibenik or book accommodation with a kayak. Several apartments in Mala Nozdra bay offer kayaks to guests – check on BarbaBooking.com when you book.
2. Tower Ruins on Žirje: The Island That Fed the Fortresses
Žirje is the largest and most remote island of the Šibenik archipelago, and also the most enigmatic. On the hill above Žirje village stand the ruins of a fortification that locals call "Gradina" – though it shares this name with dozens of other sites throughout Dalmatia. This particular gradina has Venetian foundations laid on an Illyrian base, meaning the strategic importance of this place was recognized two millennia ago.
Paddling to Žirje from Šibenik would be madness – we're talking about 22 kilometers of open sea. The smart option is to take the ferry to Žirje, then explore the numerous coves and fortifications by kayak.
Route for a day of exploration:
- Start: Žirje harbor (Muna)
- First stop: Tratinska bay – wild beach, ideal for rest
- Second stop: Cape Kapić with watchtower remains
- Third stop: Mikavica – sandy beach for lunch
- Return: Through Stupica Vela bay
The total length of this route is about 14 kilometers, which is doable for paddlers of medium fitness. Plan 5-6 hours with breaks.
3. Fortification on Zlarin: The Closest, Yet Most Neglected
The irony is that the least known fortress is also the closest to Šibenik. On the northwestern part of Zlarin, at a position locals call "Rat," lie the remains of a 15th-century defensive system. Most visitors to Zlarin never go further than the waterfront and coral workshops, making this location perfect for those seeking peace.
From the Šibenik waterfront to Zlarin, you'll paddle about an hour. From Zlarin harbor to the fortification, another twenty minutes along the island's northern coast. The entire route is protected from the south wind and bura, making it ideal for beginners.
What to bring:
- Minimum 2 liters of water per person
- Footwear for walking on rocks (the ruins are overgrown)
- Mask and snorkel – below the fortification is an excellent spot for snorkeling
- A sandwich from Bepo bakery on the Šibenik waterfront
After exploring the fortress, stop by Konoba Bokinac in the village – a fish platter and local wine will wash away any fatigue from your muscles.
4. Watchtower on Prvić: A Double Historical Layer
Prvić is an island of two faces. Prvić Luka in the south attracts visitors with the Faust Vrančić Museum and elegant villas. Prvić Šepurine in the north preserves an authentic fishing atmosphere. And between them, on the elevation above Luka bay, stands a fortification that protected the channel through which all ships sailed toward Šibenik.
This fortress is special because it combines two historical layers – a 16th-century Venetian watchtower and a 19th-century Austro-Hungarian upgrade. The Austrians recognized the value of the position and upgraded the existing walls, adding artillery platforms that faced toward Vodice and Tribunj.
Route from Šibenik:
- Total distance: 7 km (one way)
- Recommended time: 2-2.5 hours of paddling
- Stop in Bosiljina bay on Prvić for a rest
- Fortress access: From the sea, pulling the kayak onto a rocky beach
Practical Tips for a Kayak Adventure to the Fortifications
Equipment rental: In Šibenik, you can rent kayaks from Adria Kayak Tours (from 200 kn daily for a single kayak) or through Adventure Dalmatia agency. Be sure to book a day in advance during the season.
Safety: Watch the weather forecast. The maestral, the afternoon wind from the sea, regularly blows from 1 PM to 6 PM. Plan paddling toward the islands in the morning, returning before the maestral or after it weakens in the evening.
Accommodation: For multi-day exploration of the archipelago, I recommend a base on Zlarin or Prvić. Both islands have an excellent selection of apartments, and proximity to Šibenik means you can easily combine urban pleasures with adventure. Find ideal accommodation on BarbaBooking.com – filter by proximity to the sea and kayak equipment storage options.
Best period: May, June, and September. July and August bring crowds and heat that make hours of paddling a torment.
Conclusion: Why These Fortresses Deserve Your Effort
The UNESCO-listed Šibenik fortifications aren't the only ones worth seeing. These four forgotten fortresses may not have museum exhibits and audio guides, but they offer something more precious – an authentic discovery experience. When you stand on walls overgrown with capers and look at the same sea that Venetian guards watched five centuries ago, you'll feel a connection to this region that no organized tour can provide.
Grab a kayak, fill your water bottle, and set off. The Adriatic awaits.