Ok here is an idea I had.
It would be a slate ground with a rocky texture with various craters,holes and hills, above this there would be varoius mining platforms with giant (decrovative) drills into the ground.
The mining platform would have many different features, like flat areas for building. Rooms and stairs and such.
One of the drills would be wrecked and you could go through the hole and into a multitude of underground tunnels which lead to an under water spring.
If this a good idea and will anyone make it?