Echternacht is only a one hour bus ride from Luxembourg. Bus tickets were only 4 euros for the whole day and this covered the small city-country, which was great.
The town itself reminded me a lot of regional France, although I overheard German more spoken by the locals.
The town grew around the Abbey of Echternach, which was founded in 698 by St Willibrord, an English monk.
One of the things that you can do here is to relax in the small town centre with a local beer, or take a walk around the river which I did.