Tuesday 3rd May 2022 Under current restrictions, passengers are required to test negative within the 24 hours prior to boarding a flight to America and so we had independently verified Covid lateral flow tests arranged for 15:00. As rain was forecast we had booked a guided coach tour, which would keep us inside and out of the rain for the morning, to the lava tunnel at Raufarhólshellir, blissfully unaware that this excursion was to become the cause of all of Robert’s issues on the following day. As always in Iceland, the geology was impressive. The lava tube is 4,500 feet long and is one of the longest known lava tubes in Europe. Lava tubes are underground and are usually discovered only when a section of the “roof” caves in. At Raufarhólshellir, the roof has collapsed in several places and there are still snow drifts inside left over from the winter. Lava tubes are only formed during the course of effusive eruptions. If the magma has low viscosity the dissolved gases can escape from it easily and when the magma reaches the surface it forms lava flows which move slowly and steadily along the ground, melting the rock beneath it and […]