Eyvindarhellir Cave is a hidden gem at Hveravellir, where the infamous outlaw Fjalla-Eyvindur sought refuge with his wife Halla. This cave may look like just a hole in the ground, but once you step inside, you'll be surprised by its spaciousness. It served as a perfect hiding spot for the couple, offering shelter and a place to cook their meals. If you're up for a short hike, don't miss out on exploring this intriguing piece of Icelandic history!