We are traveling up from the Mosel River area on Sat.
Is there a "not to miss place" to see at the end of our trip and be close enough to be at the airport for our trip back home?
Thanks!

Brussels?

The airport is about a 20 minute train ride from city center. Just enjoy Brussels and take the train in the morning. The trains run frequently.

I usually stay at a hotel by the airport but they do get very booked up during the week.

I have stayed at Europarthotel Montgomery, the location is convenient for getting to the airport without being too far from the city center. The morning traffic to the airport during the week can be heavy however. The area is very nice and there are lots of restaurants, it's just by a metro station too so you can go to the city center. The duplex apartments are really nice.

http://www.europarthotel.com/top149_en.html

We got the Radisson SAS Brussels through Priceline for $60 for the night before our departure. It's very close to the train station, and then to the airport. Piece of cake!