Nuclear Disaster, it's a the 19th Century, Nuclear has no place. But... in a world of steampower I hope to be able to find a use for my cooling towers, if not this sign post.
Slightly clearer. Green areas display grass, where as blue is water. The large dark shapes are buildings and the circles will be massive cooling towers.
A lot of these structures really give a good idea as to what I'm going for. There's a strong industial look and the red brick and steel is perfect. The top image even has water in it which plays to the strengths of my idea.