I wanted to be able to see at least some of the terrain under the ruins in PTW, so i opened the existing ruins graphics and just started deleting stuff. I also feel it blends in with the terrain more nicely, almost as if the ruins are quite old as opposed to having just recently played catch with a wrecking ball. Voila:
http://www.civfanatics.net/uploads4/Buckets::_ruins.zip
And a sample:
http://www.civfanatics.net/uploads4/Buckets::_ruins.zip
And a sample: