Well the sun fiinally came out and it got real nice outside. I started work on my tunnel. So far it is coming out nice. Here is what I got so far. Sorry for the large pictures, my computer wont let me get them any smaller.
(http://i27.tinypic.com/wugyme.jpg)
Im using cinderblocks and paver stones for the roadbed through the tunnel. I might keep the paverstones as the roadbed. I may end up just using stones. Stone might help drainage better. Will see when I get a good rain storm. It works great I burried the cinder blocks in the ground a few inches and then fill the holes on top with stone and soil.
(http://i31.tinypic.com/2058ldg.jpg)
This is the tunnel with the roof. I had some nice large paverstones to use as the roof and another layer of cinder blocks. Again I will fill the holes in the cinder blocks with stone/soil. On top I will put plastic down to help keep moister/water out. Then I will put stone and rock on top to form a mountain.
(http://i29.tinypic.com/2luxsvc.jpg)
This is a close up. I have some nice rock shaped like bricks with a nice texture to it. I will face the outside of the tunnel with those. This will close in the entrance of the tunnel to look more realistic. The tunnel is about 13inches high.