I had the great privilege of canyoneering "The Subway" route in Zion National Park (Utah) for a second time last weekend. It is truly a spectacular canyon, especially this section for which it is named. The light shining through the subway leads you around the corner to the grand exit. Perhaps another time I will post a photo of that part. Oh, and I must point out that the slippery slope coming in from the left makes a great water slide.