Prepare for an otherworldly adventure to the Katla Ice Cave, a natural wonder accessible year round. Your journey begins in Vík or Reykjavik but we do highly recommend Vik as it is a lot closer. At the start of the tour you take a super jeep across volcanic black sand plains to the foot of the Mýrdalsjökull glacier. After a short, guided hike of about 10-15 minutes across the ice, you'll enter the cave itself. The whole experience is about 3 hours and make sure to book in advance. You can only do this with a tour. Tours cost around $120usd and I have added a link.