Amazing ! - I definitely recommend to try Snorkelling in Silfra + Lava Caving with this company, it was a really fun day and the guide Luis was super professional and cool !

Amazing tour. - The water was so clear when snorkeling but there wasn’t much to see (we understood this before booking but for those who think you’re going to see “something”, you’ll see rock formations, which is still really cool). The dry suit is amazing. Keeps you dry and relatively warm, at least in the month of May. The lava cave was cool but our guide (who’s going back to Mexico) made the tour very memorable. Five start for sure

A must do experience - It’s cold and a bit intimidating but it is 100% worth it!!! Oh my - when you look down and start floating, it is like flying over an otherworldly canyon. Unfortunately the caving part of the tour was cancelled due to earthquake activity, but this snorkelling part was extremely well done - good equipment and well explained - just do it!!

More challenging than you think, but very cool - We did the dry suit snorkeling, booked with Adventure Vikings thru GetYourGuide.com. The website seemed like you could choose wet or dry, but once there we were told we were all doing dry and would have had to book wet in advance. An amazing experience with well-trained guides. They were extremely helpful and friendly, while keeping safety the number one priority. It takes 2.5-3 hours, but the snorkeling itself is about 35 minutes. A lot of the time is spent getting the group outfitted in thermals, dry suits, head cover, gloves and more. That’s not a complaint, there is just a lot of stuff to put on and they have to help each person individually. But they are very efficient and organized. Be prepared for a loose fitting neoprene suit with tight rubber against the neck and wrists to keep water out. The suit has boots built in to the pants so nothing special needed for feet. They suggest you wear something like long sleeve T-shirt and leggings or thermals, and warm socks. It wasn’t clear on the website what we should wear, so I had on bike shorts which worked ok. Must have socks for warmth and sanitary reasons. Over that they give you a thermal onesie, and then the dry suit. On your hands are neoprene mittens with a separate forefinger and thumb. There is a second strap that goes around the neck even tighter to keep water from getting in the suit. Over top of that is a neoprene head piece that covers everything but your eyes, nose and mouth. People who are claustrophobic might have a hard time in the suit. Once you get the suit itself on, they keep adding straps and wraps and pieces, it’s tight on the neck, and you have to remind yourself you can still breathe. Especially once you get the snorkel mask and tube on, one has to stay calm and just breathe through the mouth. The water is very cold, almost freezing point, but isn’t icy. The suit keeps you warm enough, except for the few things that get water on them like your lips and lower face. Since we were snorkeling I was able to lift my face out of the water if I got too cold. Water does sneak in to the mittens. They said not to try to pour it out, that would just make things worse. So we just dealt with it, but hands were very very cold especially towards the end of the snorkeling. The view of the fissure was outstanding and very beautiful. If you wear glasses and need them to see, you either need to wear contacts for this trip or bring your own prescription mask. No way to wear your glasses and snorkel mask together. It’s challenging if you’ve never had this much gear on before, and don’t know how to maneuver really. I would think you should be at least 12-13 to do this well. It’s hard to keep up with your party and younger kids would get uncomfortable and scared. The lava cave part of the tour was also very challenging. At least 3 places where you had to crawl through a short spot on hands and knees (or plank-style), lots of bending over and clambering over rocks in low light. An interesting cave, but not the best cave I’ve ever seen. Wet and drippy which wasn’t bad, but not much in the way of natural formations. Two of the stalactites had been stolen by someone a few years back, so there was not a lot to see other than the cave walls themselves and rock layers. I might have skipped this if I had known how much tight clambering we would have to do. Still, our guide was awesome and so helpful! Highly recommend Adventure Vikings. Just be clear on the difficulty of this trip before you sign up!

Snorkeling review - Snorkeling was great!! Our guides were very nice and patient. They were there to offer help when needed. Nice warm hot chocolate was a great touch at the end

Must do activity - Great to combine activities especially if you don’t have a car. Lava cave is interesting and the lava fields it is under are also impressive. Silfra looks like not much more than a ditch from above and on a dull and snowy day I was sceptical. Put your head under the water and you immediately forget about all the hassle of getting kitted up . Crystal clear water and beautiful rock formations . Definitely worth the effort and the cold hands and face. Adventure Vikings very good professional company with friendly, helpful and informative guides

Once in a lifetime experience - One of the best things I've ever done. Once you're in the water in a dry suit, you don't feel the cold at all. I was very worried about swimming and trying to stay afloat, but the dry suit takes care all of that, you just have to keep calm and enjoy the view. Our snorkeling guides, Vero and Chicco were excellent and funny and such great company. There was another chap from Mexico, I can't remember his name, and he was wonderful as well. What a great experience! The lava caves were breathtaking and an experience I'll never forget.

Once in a Lifetime - Our guide in the Lava Tunnel was very knowledgeable and we had a great time - suggest wearing gloves and not wearing a backpack (no need). The snorkeling was exceptional and absolutely once in a lifetime. DO bring very warm base layers to wear under the dry suit and make sure you bring hats and extra warm mittens for the changing period. My fiancé ended up with a small amount of nerve damage in his fingers due to the wind and reduced circulation from the dry suit while waiting for others to change into their suits (I do think we had a slower group which may have contributed to this as well). Overall an unforgettable experience!

Best in the land of Fire and Ice - Absolutely amazing experience. The lava cave was beautiful as were the mountains around it. The guide “B” was funny, helpful and full of information. The snorkeling was unbelievable. Both Luis and Alberto were fantastic guides. They were charming, funny, and very helpful/professional. You have the option of a wet or dry suit and they do a great job explaining both and getting you suited up. Once in the water, it is breathtaking and the length of time is perfect! Once in a lifetime tour

different - A very good experience, the snorkel photos were not what I expected. The lava caves were very good, the guide was very attentive, always willing to answer questions.