Coquina wall

[bnachman]

http://farm3.static.flickr.com/2657/3954699254_059fb53f0d.jpg

[Robert_Lay]

Burning in the sky would help a little.
Basic problem is that it is still just a coquina wall.

[joedlh]

So, what story does this image tell? You need something that reaches out to the viewer.