Seljavallalaug is a 25-metre outdoor pool with natural hot water. The pool is human-made and is one of the oldest ones in the country - it dates back to 1923. It is located in the southern part of Iceland, between two other must-see natural phenomena - the Seljalandsfoss Waterfall and the Skógafoss Waterfall. It is surrounded by a breathtaking natural view of the valley and the mountains. Bathing in the pool is free of charge, and it is advisable to do it in the summer season because when the temperatures become lower, the water inside is only slightly warm.