Singen

The next day, they boarded a train to Ulm.

From there, they needed to take one more train to Singen on the Swiss border.

When they try and buy the tickets, the woman behind the counter looks at their papers and says she's seen something wrong there and so calls a policeman.

The policeman asked Lutjen, Why do you want

to

go to Singen when the papers only allow you to go as far as Ulm?

And he says, well, look, we're Dutchmen.

We've never seen mountains.