What you see here is me looking down a nice long lift shaft.

The set up was a little tricky as it was quite dark, I was stood at the top of a ladder and holding on to the tripod while setting the camera on a 10 second countdown to thrust it out into the shaft and let it settle before the exposures kicked in.

As a result the composition was a little bit hit and miss, so I had to do a little perspective/distortion/warping in CS6 afterwards. The results had a contrast boost and then I added the Urban Sickness filter from Perfect Effects by OnOneSoftware.