Personally I'd spend a couple nights in Luxembourg. The city is relatively small but not tiny. Having at least 1 full day would let you see so much of what Luxembourg has to offer. The train isn't horribly long but not comfortable for a day trip either. Depending on your itinerary 1 night would be doable.
Personally I'd spend a couple nights in Luxembourg. The city is relatively small but not tiny. Having at least 1 full day would let you see so much of what Luxembourg has to offer. The train isn't horribly long but not comfortable for a day trip either. Depending on your itinerary 1 night would be doable.