with an additional edit using a graduated filter...
With additionally some colour noise reduction...
many thanks Abambo
You're welcome. And good luck.
Your two photos are underexposed, so you have to lighten them as indicated.
Take note of your histogram:
The first picture shows this:
Notice you have a large area heap on the left side. This shows that more pixels are in the shadow areas. You need an even distribution of pixels.
As a basic example, if you use auto exposure in Lightroom/Photoshop Camera Raw - (if you took this in raw, or Camera Raw Filter if you took it in JPEG), you get this:
and corresponding histogram:
The pixels are better distributed - from dark to light.
The histogram is very useful!
The second picture is a similar situation.
I have nothing more to add to this thread other than to say you have received some very solid feedback and advice from the ACPs here. Great thread!