Try snorkelling between two tectonic plates in the crystal clear glacial waters in the Silfra Fissure. You will experience some of the clearest waters in the world - filtered through vast lava fields.

The water here is COLD! Dress warm - the tour company will provide your with a dry suit to put on over your clothes. After the tour, enjoy a nice cup of hot chocolate to warm up.

Meeting Point: park at Þingvellir Parking P5 and walk across the bridge towards the dive vans. Several companies operate this tour so be sure to find the Arctic Adventures van.

Participants must be age 12 and up, able to swim and meet the other physical guidelines.