Modern architecture hub
Medieval fortress tour
Historic town walk
Scenic castle views
Nature hiking experience
Rock formations visit
Vineyard landscape tour
WWII memorial visit
Zoo & amusement park
Luxembourg history exhibition
Classical music show
Underground fort tour
Culinary experience
Main square visit
If you have more time, consider adding a day trip to Trier, Germany or Dinant, Belgium. If you have less time, you can skip some of the destinations or combine them together in one day. Make sure to check opening and closing times for each place on the day you plan to visit to ensure it's open.