This is probably one of the most unique and extreme sleeping options in Iceland - and definitely one of the most beautiful ones. Thanks to From Coast To Mountains Tours you have a chance to spend a night in an ice cave of Vatnajökull - the biggest glacier in Europe.
Thick mattresses, arctic sleeping bags, hot food and drinks are all provided. Prepare for a bit of cold and 2-3 miles hike to the destination. But judging from the photos - it's worth every penny!
Photos: David Phan/Flickr
License: Creative Commons 2.0