This is last minute, but I am lost! I'm flying into Hamburg to meet my husband after a conference and our flights out are out of Frankfurt 4 days later. So basically, we have no clue with regards to an itinerary between Hamburg and Frankfurt with the 4 days. The first night we are staying over in Hamburg and the last night in Frankfurt, so we have 2 additional nights in between. Initially, we thought about taking the train to Berlin, staying 2 nights, then taking the train to Frankfurt for our flight out the next morning, but that seems like so much train travel...and pretty $$$. I don't know if we should just stay around Hamburg area and make our way to Frankfurt, or head to Frankfurt and see things around there. Help!