If you’re dreaming of a truly unique Iceland experience, this Silfra Snorkeling & Lava Tunnel Adventure from Reykjavik might just be what you’re looking for. It combines two incredible activities—caving through volcanic tunnels and floating in the famous Silfra fissure—offering a mix of geological marvels and adrenaline for those eager to see Iceland’s underground world.
What we really appreciate about this tour is how it manages to balance adventure with comfort, providing all the necessary gear and thoughtful touches like free underwater photos and post-activity hot cocoa. On the flip side, it’s a long day, and those who aren’t comfortable in cold water or have medical conditions will want to check if this tour suits their needs.
This experience is best suited for travelers with a sense of adventure, good swimming ability, and a curiosity for Iceland’s volcanic landscapes. It’s ideal for those who want an active, memorable day filled with natural wonders and engaging guides.
Key Points

- Combination of activities offers a well-rounded Icelandic underground experience.
- Expert guides make the experience both safe and engaging.
- Cold water snorkeling requires comfort in water and some physical fitness.
- All gear and photos are included, making it convenient and memorable.
- Duration varies from 5 to 10 hours, so expect a full-day outing.
- Not suitable for children under 12 or pregnant women, due to water conditions.
An In-Depth Look at the Tour Experience

If you’re considering this tour, let’s walk through what you can expect and why it’s a worthwhile addition to your Iceland itinerary. What makes this outing stand out is how it combines geological exploration with the thrill of being in the water.
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Starting the Day: Pickup and Travel
The tour usually begins with hotel pickup if you select that option, taking you from Reykjavik to the tour sites. The journey itself is part of the experience, as guides point out fascinating sights and share stories about Iceland’s volcanic past. The small group sizes, often just a handful of people, ensure a more personal experience—something many reviews highlight as a plus.
Lava Caving: Walking Through the Earth’s Fire
The lava tunnels are first on the agenda. We loved the way guides explained the formation of these tunnels, helping us appreciate the powerful natural forces that shaped Iceland’s landscape. The tunnels aren’t overly colorful like limestone caves, but their raw, volcanic character makes them fascinating.
One reviewer noted, “The lava tunnels were absolutely breathtaking,” and another called the guide “brilliant, lovely, and full of interesting facts.” It’s a bit like stepping into another world—dark, cool, and full of natural sculptures created by past eruptions. You’ll get to explore intricate formations, crawl through some sections, and learn about the geological processes that created this underground maze.
Snorkeling in Silfra: Floating Between Continents
Next up is the highlight for many—snorkeling in Silfra, which is famous for its insane water clarity and vivid blue hues. Guides are PADI certified, and they take the time to ensure everyone is comfortable with the gear and the process. They also take underwater photos for free, a nice touch that helps you treasure the experience without extra effort.
One user said, “The snorkeling was a once-in-a-lifetime experience,” and many agree it’s a surreal feeling to float in water so clear, between two tectonic plates. The gentle current makes it easy to glide along, and the buoyant suits keep you warm despite the icy temps outside. Expect to spend about 40 minutes in the water, which many find just enough to soak in the scenery without feeling overwhelmed.
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After snorkeling, you’re treated to hot cocoa and biscuits—an appreciated warm-up after the cold water. The guides also help with packing away gear and making sure everyone feels comfortable.
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Duration and Flexibility
The entire trip can last between 5 to 10 hours, depending on your pickup and the pace you prefer. Some reviews mention early starts, but most find that it’s a full, rewarding day. Be sure to check availability and starting times, as this influences your planning.
The Practical Side: What’s Included and What to Know

Included in the price are all essential gear—snorkeling and caving equipment—plus guides who are certified and knowledgeable. The tour fee also covers the admission to Thingvellir National Park, where Silfra sits, and the free underwater photos. The post-snorkel hot cocoa is a thoughtful extra, especially after being in cold water.
Guides are often praised for their friendliness, patience, and expertise. One reviewer remarked, “Our guide John was absolutely brilliant,” emphasizing how guides make a difference in such an adventure.
What to Bring and Prepare
You’ll want to dress warmly—think layers, as Iceland’s weather can be unpredictable—and pack a change of clothes, a towel, and socks. It’s also important to review the Snorkeling Handbook to ensure you’re comfortable in water and aware of safety procedures. Some medical conditions can disqualify participation, so check if you need medical approval beforehand.
Suitability and Restrictions
This tour isn’t for everyone. It’s not suitable for children under 12, pregnant women, or travelers with mobility issues or claustrophobia. You should be comfortable in water and able to swim, as the suits are buoyant and designed for safety and warmth. Non-swimmers or those with respiratory or heart conditions should consider this carefully.
Group Size and Atmosphere
Many reviews highlight the intimacy created by small groups, with guides making sure everyone feels taken care of. The relaxed but professional environment boosts confidence for less experienced swimmers.
Authentic Experiences from Travelers

Reviews paint a vivid picture of the tour’s appeal. Travelers love the knowledgeable guides and the way they make each activity fun and informative. Many mention how the lava caves are “breathtaking,” and snorkeling “out of this world”—a phrase that captures how memorable this activity is.
Several reviews also mention the delicious baked goods and the friendly attitude of guides, which adds a warm touch to an otherwise chilly adventure. One reviewer said, “The guides are fun and nice and informational,” summing up the overall vibe.
What Could Be Improved
A few travelers noted that the tour is shorter than expected—around 40 minutes in the water, which some might find brief considering the full day involved. Also, the cold water can be intense, but suits are well insulated, and most find they don’t feel the cold thanks to the gear.
Final Thoughts: Is This Tour Worth It?

If you’re someone who craves adventure, loves geological wonders, and isn’t daunted by cold water, this tour offers an experience unlike anything else in Iceland. The combination of lava tunnels and snorkeling provides a fantastic way to see Iceland’s volcanic landscape from below and above ground.
It’s particularly great for those who enjoy guided activities with safety and comfort in mind. The guides’ enthusiasm and expertise are highlighted repeatedly and add so much value to the day.
While it’s a lengthy day and requires some physical comfort with water, most travelers agree it’s absolutely worth the cost of $210—especially considering the included photos, park entry, and post-activity treats. If you’re looking for a memorable, active way to explore Iceland’s volcanic soul, this adventure is a solid choice.
Reykjavik: Silfra Snorkeling & Lava Tunnel Adventure Combo
FAQ

What is included in the tour price?
All necessary caving and snorkeling gear, guides, park admission, underwater photos, and hot cocoa with biscuits afterward are included.
How long does the tour last?
It ranges from 5 to 10 hours, depending on availability and pickup times. Expect a full day of activity.
Is this activity suitable for children?
No, it’s not suitable for children under 12 due to water and safety considerations.
Do I need to be able to swim?
Yes, participants should be comfortable in water and able to swim, as the suits are buoyant and designed for safety.
Is any medical approval needed?
If you have medical conditions, you should read the Snorkeling Handbook and get approval from a doctor if required.
Can I participate if I am pregnant?
No, pregnant women are advised not to participate due to potential risks from cold water.
What should I bring?
Warm clothing, a change of clothes, a towel, socks, and possibly contact lenses if you don’t wear glasses underneath the mask.
Are the guides friendly and knowledgeable?
Yes, reviews highlight guides as helpful, funny, and full of interesting facts.
Is the snorkeling water cold?
Yes, but suits are well insulated, so most participants don’t feel the cold excessively.
What’s the main highlight of the tour?
Many say the snorkeling in Silfra, floating between two tectonic plates in crystal-clear water, is the absolute standout.
In all, this Silfra and Lava Tunnel Combo offers a unique peek into Iceland’s volcanic core—both literally and figuratively. It’s ideal for those looking to combine adventure with scenic beauty and willing to brave the cold waters for a once-in-a-lifetime experience.
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