This is a reprint of one in my gallery I uploaded in November 2007. Here I went to a warmtone paper and toned in thiocarbamide and selenium.
It had been a difficult lighting situation, with the dark parts of the right hand near wall on zone III and the foliage outside above zone IX. I used N-2 development but wish I had known about SLIMT then.
Whatever method, you managed to capture that full contrast range exceptionally well, with full detail in the background. I would even maybe argue that it is slightly overdone... if you kept the (foreground of the) "tunnel" a bit darker, I think it would add more depth and three dimensionality to the image.