I cannot tell by the 1st picture, but it looks like ther may be a stream behind there in the treeline. Just make sure if it is a stream, water running or not, you make sure that it is ok from the DNR.
I have a stream on my Da’d property that is dry 99% of the year and mostly only runs in the spring or when there is heavy rain fall. We talked to the DNR about building a pond, but they call the stream a navigable waterway and would not let us build a pond where we wanted to.
Ben