Get ready for a little adventure at Rauðfeldsgjá, a dramatic crack in the mountainside that feels like a secret entrance to another world. After a short, steep 10-15 minute walk up from the car park, you'll find the narrow opening. Step inside to discover a mossy, green-walled cavern with a stream flowing through it. For the more adventurous, you can carefully make your way further in, hopping over stones and even climbing a small waterfall with the help of a rope to see what lies deeper within this mystical gorge.