[not2b]

Yes, did that also. I live in California, but at the time my company had a group in Aachen that I worked with and I visited about four times a year. I often played tourist on the weekend and took trains all over the Rhineland. I used the cheap weekend ticket several times. But I usually didn't go that far, given my time constraints.

[Bromeo]

Coming from Aachen and now living in California, I hope you had a good time! I think Aachen already has a quite "cute city" vibe to it, and there's many nice places to reach within a few hours, like Cologne, Düsseldorf, Bonn, and even parts of the Netherlands and Belgium!