Hint #4: Look Out!

True to our word, I’m back with another clue about our summer plans.  As you know, Martin and I can’t spend the season in Germany.  We’re planning a little adventure in the US.  I’ve already shown you pictures of clouds and Martin surrounded by dirty wires, a beautiful country road, and a big hunk of green metal (that was quickly identified, by the way – bravo!).

Now we’re on to our fourth hint about where we’re off to for the summer.  Grab those thinking caps because here it is:

look out

So what do you think?  Give us your best shot!