The Valdeinfierno stream is one of the wildest corners of the Sanabria Lake and Segundera and Porto Mountains Natural Park. It originates on the high slopes of the mountain range and descends, nestled between granite rocks, forming small waterfalls and crystal-clear pools. Access requires a hike along mountain trails, so it is advisable to wear good footwear and bring provisions to enjoy this unspoiled landscape at a leisurely pace.