Vacation -- Your suggestions?

Well, it's time to begin deciding where to spend a week in June. We'll probably stay close to the midwest. I like this part of the country and there is still much that I have to see. Right now, Cleveland seems to be in the lead, but mostly that will be a weekend visit. Is there anything within a ten hour drive west of Cleveland that any of my readerfriends can recommend? The goofier, the better. Let me know what you think.