Went on a photo trip with a friend today, and after walking into this tunnel I though it might be a cool location for some portraits of him: 1. 2. 3. Sorry about the large images, but they are simply too dark to be properly viewed in postcard size. Taken on my D40 in manual mode, with shutter speed at 1/40th to prevent blur from camera shake, f/6.3 and ISO 800 to get enough light without using flash. It took ages to find the right setting - auto mode made everything appear like it was a sunny summers day (NOT the effect I was after), P (programmed auto mode) made the subject too dark. I wanted to make it look like night, and have the lights at the top nicely light up the subject. I usually don't do any PP, but here I brightened quite a bit (I underestimated just how dark the photos would come out) and incresed sharpness by a small ammount. Sorry for all the blabbering. CC welcome.