Diekirch is a small town in Luxembourg, best known for its brewery of the same name and the National Museum of Military History.
Diekirch can be easily covered on foot. The town center is about 1 km away from the train station, just follow the crowd down the road. The Military Museum is just up the hill from the central church.
Diekirch has a large brewery building right across the tracks from the train station, but alas, there are no tours available for visitors. You can console yourself with a freshly made brew at any of the many restaurants in town.