They would have set it all back to the way it was.
I don't know if you noticed, but the time you were in the Distortion World is actaully a long time and being that time goes faster in the Distortion World you would come back to find the world ahead of when you left it.
Distortion World doesn't go by the normal worlds time.
Besides why would they leave a perfect lake like that? They would actually have put a lot of efforts into replacing it.
Hope this answers your question :)