The street right next to the Grand Place and 5 minutes from the Central Station.
Admission Ticket Free
Grand Ducal Palace (Pass By)
You can cancel up to 24 hours in advance of the experience for a full refund.
Fortunately for travellers a day tour from Brussels going to Luxembourg is available with an added bonus.
Travelling to Denante in the dark was not really worthwhile - impossible to see anything (even the church had a service so we couldn't enter).