close-up cave guide shining light into lava tube hallway of Leidarendi with magma rocks piling behind

Snorkeling Silfra, Caves & Volcanos

Walk through lava tubes and swim between the continents

Snorkel through lava filtered water and walk where lava flowed

In one day you will snorkel through one of the world’s most fantastic snorkel and dive sites, Silfra, and go hiking through a lava tube that was created thousands of years ago by a river of red glowing lava! This tour combines our Silfra Snorkeling Tour with a tour of volcanic activity on the Reykjanes peninsula, including a hike through a lava tube.

The lava tube you will visit is called Leiðarendi cave. Leiðarendi displays the typical features of this most common type of lava cave in Iceland. It is full of utterly weird and wonderful rock formations as well as a splattering of amazing colors. Even though at some points inside the cave we will have to climb and crawl a little, this cave tour is an easy one that can be undertaken by everyone who feels comfortable in confined spaces and is fit to take a short hike. Please make sure to bring good shoes.

Prior to your hike in the lava cave, you will see another feature of tectonic activity from another and most unusual perspective: underwater! Silfra is a fissure created by the Eurasian and North American tectonic plates pulling apart. The fissure is filled with crystal clear glacial water that has been filtered underground for decades. This is an underwater scene unlike anywhere else on earth. You can read more about the Silfra snorkeling tour here.

The Silfra Snorkeling & Lava Caving Tour is a great combination tour for those who want to make the most of their time in Iceland. Please note that the volcano and caving tour is operated by a trusted partner.

Our Souvenirscan be purchased in your booking process by selecting them under "Extras". If the Souvenir you are looking for is not listed below please contact us or leave a comment in your booking and we will bring it on tour with us.

Kevin M 18.09.2016
Amazing dive/lava caving combo

Enno and Eric did a wonderful job as our guides. Very helpful every step of the way. I dove and my girlfriend snorkeled. We were both very pleased with our tour. Our driver Stephano got big points too. While we were driving out to the park we saw a sheep that had tangled itself in barbed wire and was in great distress. Stephano made a quick u-turn to help free the poor little guy. Left a great impression for us. As for the diving, you will not see visibility like this anywhere else on earth. I've been to the Maldives, Red Sea, Micronesia, Palau, Belize; and this dive is still up there in my favorites. We also did the lava caving combo in the afternoon and we would highly recommend that as well. Didn't feel too "touristy". You actually have to get down on your hands and knees and do some crawling, and it is pitched black when you turn your torch off.

DIVE.IS is rated No. 1 of all 279 Outdoor Activities

Tour Details

  • All year round

  • 7-9 hours

  • Maximum of 6 participants

From ISK 40.890

Please bring:

  • Long underwear
  • Thick socks
  • Suitable clothes for the weather of the day
  • Good shoes (e.g. hiking boots)
  • Warm clothes for caving
  • Contact lenses if you wear glasses


  • Free hotel pick up and return
  • Guide
  • Guided snorkelling trip
  • Guided cave tour
  • All necessary equipment
  • Hot choclate and cookies after the snorkeling trip
  • Entrance fee into Silfra


Please see the booking calendar below for available departures.

Safety requirements

  • have read, signed, and followed directions on the online Snorkeling Silfra Medical Statement (link provided in confirmation email) PDF

  • have our Snorkeling Medical form signed off by a doctor if they are age 60 or older PDF

  • sign our liability release form at the start of the snorkeling tour PDF

  • be at minimum 150cm / maximum 200cm

  • be at minimum 45kg / maximum 120kg

  • fit within our dry suit size chart PDF

  • be at least 12 years of age on the year

  • be comfortable in water and be able to swim

  • be physically fit

  • be ready to wear a sometimes tight & constricting dry suit

  • be able to communicate in English

  • not be pregnant

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Your bookable extras

Guides on this tour

You might be guided by one of these nice guys

You'll snorkel and go caving here


Thingvellir National Park
801 Selfoss

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Frequently asked questions about our Snorkeling Silfra, Caves & Volcanoes Combo Tour

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