Into the Subglacial Tunnel A POST FROM THE SUB-GLACIAL BLOG: After a steep walk up the mountain, we arrived in front of the tunnel entrance. There we stood, in shorts and t-shirts, suddenly realising that the heat and sunshine we were used to until now were about to become only a distant memory. With our winter coats, hats and gloves on, we followed Miriam as she opened the door leading into the mountain.