The El Bastón long distance trail passes the rocks. Climbing them wasn't permitted, so I just walked around them.
The part of the two days hike of The Great Caldera Circuit. Amazing walk over the highest mountains of La Palma Island.
Having been chased down Piedra Llana by thick fog we intended to leave the caldera rim when finally the clouds opened up and showed a big patch of blue sky exactly as we were driving by the closed road to los Muchaachos. Parked our car and hastened up in perfect weather. Found a stonehenge like rock circle on the summit (natural though). Everything was covered in a thick rime cover.