As someone seems to have clicked a button to make this popular, I'd better add a few comments about it (oh and thanks to whoever did that).
The shot is in the tunnels of the former Fort Nepean at the entrance to Port Phillip Bay (near Melbourne, Australia). My son was a little nervous to enter because as well as the dark, there were sound effects (shouting & bangs) in there.
As for the tech side of things, I was experimenting with the capability of shooting in the dark with the new (to me) D7000. The shot is an in-camera B&W jpeg, with a slight touch of highlight slider to bring out the detail in the outside. Interestingly, pulling the shadow slider a long way across allows the writing on the beams to be read "Mind your head" it says.
ISO800, 1/50s and f/4.8
Image META information
File Name
gallery_4677_341_1311512.jpg
Unix Timestamp
1343822861
Original File Size
2734239
File Type
2
Mime Type
image/jpeg
Sections Found
ANY_TAG, IFD0, EXIF
HTML Sizes
width="4928" height="3264"
Image Height
3264
Image Width
4928
Color
TRUE
Byte Order Motorola
TRUE
Aperture F-Number
f/4.8
COMPUTED.UserCommentEncoding
ASCII
COMPUTED.Copyright
Chris CROWE
Camera Make
NIKON CORPORATION
Camera Model
NIKON D7000
Orientation
The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side