These rocky outlets, created by rising lava, three million years ago are home to the most complex tunnel system known to mankind, these tunnels known as the Vorsprung Durchgang (German for the Projection Passage) span over 200km and connect the furthest islet in the Ornament Skerry to the nearest. When arriving at the port, you notice there are no trees whatsoever. A hole is seen and a hut is featured next to a small barrel cactus. If you dare to venture down into the tunnels you will find yourself in a lit up corridor, going downwards. Water from the sea seeps through cracks in the walls and mice scurry frantically. There are many turn-offs and passages you can venture into and many sealed away, due to safety. The remains of a railway track can be seen throughout the way down.