How used? Simple - your party finds the ruins in some out of the way place. Perhaps some spirits or things drawn to chaos and insanity if you need the ruins to be a little less lifeless. I think the odd ruins sitting silently by themselves works.
It brings to mind the speculative cities the Chinese have been building, well before anyone is ready to occupy them, and now sit largely abandoned. Go to Comment
Cheka, it is not that hard. Simply practice. Then read what you write... going through and seeing if there are any questions unanswered about "what things are and what is going on". Then check to see if there are any good plot hooks or little pieces of chrome you can add. Walah! instant better than average post. Then after practicing that for a while, you get to great and awsome posts. Go to Comment
You've probebly heard of the real Thomas Hopkins, Witchfinder-General, who hunted down and hanged suspected "witches". What if there was a world/realm where magic was normal, and it was the non-witches and non-wizards who were hunted down and hanged as inferior beings?