★★★★★★★★★★4.6 · 205 reviews · 5 - 10 hours · from $209
Reykjavik lava tunnel caving and Silfra snorkeling in Thingvellir, with dry suits, free underwater photos, and tectonic-plate blue water.

“We were picked up from our hotel to go the the Lava tunnel 1st. Our driver was quiet but friendly (there was only 3 of us!). The tour guide who took us into the tunnel was absolutely brilliant, lovely & offered to take photos for us, as well as recommending spots to get amazing photos. She was full of interesting facts & made the tour even more amazing. We were then taken to a bakery for lunch break (the savory snacks, cakes etc were delicious). Our driver for the next part of our tour was brilliant & enthusiastic about Iceland. He was interesting & amazing, he told us so many…”
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