OK. I hope this is a fun request. I'm flying from the east coast to Berlin in June. I'm not going to name the origin city to protect the innocent. Let's assume I can leave from anywhere from ORD-east. I have 24 hrs spare to get to Berlin. Where should I stop en route? I would really prefer that the flights were on one world, but it's not necessary. Iceland?

Due to time constraints, off the beaten path options are going to be difficult.

I am flying business, but can't really add too much to the cost. Great historical sights, beer and great food are all options...London is out.

Thanks!