It's gotta be this one:
It's taken in a tunnel that's still under construction. There were guided tours on this particular day and I went way out of my comfort zone to take it. Nothing I normally take pictures of and in a huge crowd of other "tourists"... Not my cup of tea at all. But I'm glad I joined, 'cause the tunnel had some very photogenic areas, such as the one shown above.
Date picture taken: June 6, 2009
EXIF:
Camera: Nikon D40
Exposure: 0.003 sec (1/320)
Aperture: f/10.0
Focal Length: 32 mm
ISO Speed: 800
Exposure Bias: -5/3 EV
Flash: No Flash