The Blue Cave on Biševo Island, known locally as Modra Špilja, is one of Croatia’s most captivating natural marvels. Carved by the sea into the limestone cliffs of Biševo, this cave glows with an ethereal blue light when sunlight filters through its underwater entrance—an effect that draws visitors from all around the world.
What Makes the Blue Cave So Special?
- Natural phenomenon: Sunlight enters through a submerged opening, hits the sandy bottom, and bathes the chamber in a vibrant, otherworldly blue.
- Ideal viewing time: Between 11 AM and 12 noon, when the sun is highest, the cave’s glow is most intense.
- Historical charm: Once hidden and only known to fishermen, it was “discovered” by Baron Eugen von Ransonnet-Villez in 1884—prompting the entrance to be widened for small boats.
How to Reach the Blue Cave from Split
Most visitors book through split boat rentals which offer either full-day tours or private charters as part of the split boat trips experience.
By Small Boat
Tours begin with a speedboat ride (about 90 minutes), then a transfer into a smaller boat to fit through the narrow cave opening.
Self-Guided Option
Travelers can also take a ferry to Komiža and catch a taxi-boat to Biševo, a flexible option for solo explorers.
What to Expect on a Tour
Most full-day split boat trips combine the Blue Cave with other key sights like:
- Hvar and the Pakleni Islands
- Stiniva Bay
- Blue Lagoon
- Budikovac Island
Inside the cave, boats drift silently as the interior glows electric blue—a surreal moment captured best in person.
When to Visit
- Season: May to October
- Best Time of Day: 11 AM – 1 PM
- Early tours: Beat the crowds and catch optimal light
Booking Tips
- Choose tours with cave entry included in the price
- Private charters offer more flexibility and fewer wait times
- For the most comprehensive itinerary, consult the top boat destinations in Split
Final Thoughts
The Blue Cave is more than just a popular destination—it’s an unforgettable highlight of the Adriatic. Whether part of a group outing or a private journey via split boat rentals, this experience offers a glowing escape into Croatia’s natural beauty and is a must on any island-hopping itinerary.
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