The cavern we are in gets larger up ahead, the vaulted, stalactite clad ceiling lit up by a soft orange glow, expands outward then opens up on a black void. A string of lights like a band of diamonds stretches out into the darkness, shedding light on a vast canyon beyond. The floor drops off steeply to the river down below and the ceiling disappears overhead. There is a rushing of water from the river and the air feels cooler. A silent, ” bloody hell” rises up in me at the sight of the canyon which is awesome in the true sense of the word.