Reykjavik: Silfra Snorkeling & Lava Tunnel Adventure Combo

Travelers often rave about Iceland’s unique landscapes, and this Silfra Snorkeling & Lava Tunnel Adventure from Reykjavik offers a taste of what makes the country so special. Combining underground exploration with floating between tectonic plates, this tour promises unforgettable sights and stories—plus a few icy shocks along the way. With a 4.7-star rating from 188 reviews and a reasonable price of $209 per person, it’s clear many find this experience well worth the expense.

What makes this tour stand out? First, the expert guides who make safety and fun their priorities. Second, the breathtaking scenery both underground and in the water, which you’ll snap pictures of (the free underwater photos are a nice bonus). Third, the balance of adventure and comfort, with all necessary gear provided and opportunities to warm up afterward. The only potential hiccup? It’s a physically demanding experience that involves swimming and cold water—so it’s best suited for those comfortable in the water and able to handle the chill.

This activity is ideal for adventurous travelers who want to see Iceland’s volcanic and geological marvels without much fuss. If you’re curious about geology, love outdoor activities, or enjoy trying something a little different, this tour is likely to be a highlight of your trip.

Key Points

• Unique underground lava tunnel experience offers insight into Iceland’s volcanic past.
• Snorkeling in Silfra provides a surreal, crystal-clear water adventure between two tectonic plates.
• Guides are knowledgeable and attentive, always ensuring safety and fun.
• All equipment is included, so you don’t need to worry about bringing your own gear.
• Photos are free and a nice way to remember your underwater journey.
• A bit cold? The insulated suits and warm post-snorkel cocoa help keep you comfortable, though be prepared for icy water.

You can check availability for your dates here:

An In-Depth Look at This Adventure

The Itinerary: From Lava Tunnels to Tectonic Plates

This tour kicks off with lava caving at Raufarholshellir Lava Tunnel, a site often described as both fascinating and photogenic. You’ll meet your guide, equipped with caving gear, and head into the dark, winding tunnels formed by historic volcanic activity. Reviewers mention guides like Francesca and Yannis, who are praised for their energy and wealth of knowledge. One reviewer noted that their guide shared local stories and even a ghost story while sitting in the dark—a fun touch that makes the experience more memorable.

The lava tunnels are generally described as intriguing and visually impressive, with some reviewers noting the less colorful, more subdued tones compared to limestone caves. Still, the experience of crawling and walking through these volcanic tubes adds a sense of adventure and connection to Iceland’s volcanic roots.

After exploring, you’ll visit a local bakery for a short, tasty break—a thoughtful touch that many reviewers appreciated. It’s a chance to relax, refuel, and chat about what you’ve seen before heading to the next part of the tour.

The Highlight: Snorkeling in Silfra

Post-lunch, you’ll travel to Thingvellir National Park, a UNESCO site, where the real magic happens. The Silfra fissure is renowned across the world for its remarkable clarity—water so pure that visibility often exceeds 100 feet. You’ll don your snorkeling gear, with guides like Weronika, John, and Norris ensuring everyone is comfortable and safe. Guides check in regularly and support participants who are nervous or new to snorkeling, which makes the experience accessible even for non-swimmers.

The water temperature hovers around 2°C, but the suits are well insulated—many reviewers mention that they didn’t feel cold, or only felt cold on their hands and face. One person shared that, even in -8°C outside, the suits kept them warm enough to enjoy the float. Snorkelers describe the sensation as “out of this world”, especially floating effortlessly between two continents—North America and Eurasia.

The crystal-clear water reveals every detail of the rocky landscape, with shades of blue so intense they seem otherworldly. Many reviewers mention how surreal it feels to glide over the fissure’s depths, with some saying it’s a once-in-a-lifetime experience they’ll never forget.

Guides and Equipment: Making It Easy and Safe

All necessary gear is provided, including snorkeling gear and caving equipment. Guides are certified, attentive, and clearly passionate about Iceland’s geology. One reviewer called their guide “brilliant,” noting how they made sure everyone was okay and gave helpful instructions. Photos taken by guides are complimentary, capturing the moments underwater, a great bonus for sharing your adventure afterward.

Participants are advised to review the Snorkeling Handbook beforehand, which covers important safety info, medical considerations, and what to wear. The tour emphasizes that participants should be comfortable in water, able to swim, and not pregnant, due to the cold water and gear.

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Logistics and Practicalities

The tour’s meeting points are well organized. It begins with a pickup or a meet at the Raufarholshellir Lava Tunnel, roughly 15 minutes before departure. After the lava caving, you’ll have a chance to relax and grab a bite before heading to the national park for snorkeling around 1:30 pm. The second meeting point is at Thingvellir Parking P5, where the snorkeling gear and guides await. The entire day is designed with plenty of time for each activity, plus optional breaks.

Expect to spend about 2-3 hours at the lava tunnel and approximately 1.5 hours snorkeling, including preparation time. Many reviewers mention that the group sizes are small, which adds to the personal feel and the quality of the experience.

What to Bring and Wear

Comfort is key. The tour advises bringing warm clothes, a change of clothes, a towel, and socks. Since changing occurs outside, dressing in layers and wearing thermally comfortable clothing are essential. Think ski underwear or tight-fitting activewear under your dry suit. Some reviews recommend bringing contact lenses, as glasses cannot be worn underwater, and suggest waterproof cameras if you want to capture the moments.

What Do Travelers Say?

The reviews are overwhelmingly positive, with many highlighting the guides’ professionalism and friendliness. Participants loved the stunning scenery—both the lava tunnels’ textures and the breathtaking clarity of Silfra’s waters. Several reviewers mention how well-organized everything was, from the equipment to the transportation.

One traveler described the entire day as “a once-in-a-lifetime” experience, praising the guides for their energy and support. Others appreciated the local touches, like the bakery stop, which added a warm, community feel to the adventure.

The snorkelers’ comments often focus on how surprisingly warm they felt in the suits, even in freezing conditions, making it accessible for those worried about the cold. Many users also pointed out that the experience is suitable for most people who are comfortable in water and able to swim, though it’s not recommended for pregnant women, children under 12, or those with certain medical conditions.

The Sum Up

This combo tour of lava caving and snorkeling in Silfra offers a rare glimpse into Iceland’s volcanic heart and underwater world. It’s a fantastic way to experience the country’s geological marvels without needing specialized training—just a willingness to get a little wet and cold. The guides’ expertise, alongside the stunning scenery, makes it a memorable, well-organized day.

While the experience involves cold water and some physical activity, the insulated suits and thoughtful logistics help keep discomfort to a minimum. It’s perfect for adventurous travelers eager for a mix of underground exploration and underwater discovery, especially those who enjoy learning about geology and nature firsthand.

If you’re visiting Reykjavik and want to tick off two iconic Icelandic activities—lava tunnels and Silfra snorkeling—this tour delivers excellent value for money. Just remember to review the safety information and come prepared with warm clothes and a sense of adventure.

Frequently Asked Questions

Is this tour suitable if I don’t know how to swim?
While non-swimmers can participate, you need to be comfortable in water and able to swim. The suits are buoyant, and guides are attentive, but some physical ability is necessary.

Are the snorkeling suits warm enough?
Yes, the suits are well insulated, and many reviewers say they didn’t feel cold during the snorkel, even in freezing outdoor temperatures.

How long do the activities last?
The lava caving typically takes about 2-3 hours, including travel and exploring. Snorkeling involves roughly 1.5 hours, including preparation, gear-up, and floating time.

What should I wear for the lava tunnels?
Layered, warm clothing, such as thermal underwear and sturdy footwear, is recommended since you change outside and walk through the tunnels.

Can I join if I’m pregnant or have medical conditions?
No, pregnant women and individuals with certain medical conditions should avoid this activity due to the cold water and physical demands. It’s advised to read the detailed guidelines beforehand.

Is transportation included?
Yes, if you select the hotel pickup option, transportation to and from the activity locations is provided.

What’s included in the price?
All technical gear (caving and snorkeling equipment), guides, entrance fees to Thingvellir National Park, and free underwater photos are included. Post-activity hot cocoa and biscuits are a nice touch too.

Can I cancel if my plans change?
Yes, cancellations are accepted up to 24 hours in advance for a full refund, giving you flexible planning options.

This adventure blends Iceland’s volcanic past with its spectacular present, making it a must-do for anyone who craves a hands-on experience in this wild corner of the world.

You can check availability for your dates here: