The sheep's fondness for end-of-the-Earth locales led me to this precipitous slope, struggling to find a way up without somersaulting 600 feet (183 meters) down a field of jagged basalt rocks.
Volcanic activity that began roughly 14 million years ago laid the foundation for the jagged landscape we see ... with lava that hardened into a tough, basalt crust. The chimneys, technically ...