Hop On Hop Off should be considered by those who want to explore Luxembourg. The tour implies sightseeing from the roofless deck of a double-decker
Vauban Luxembourg Itinerary is all about trips to fortresses dating back to some centuries ago. It is a highly cultural circuit.
This is a list of parks in Luxembourg. The Municipal Park, Merl Park, Tony Newman Park are the most notable, though green spots refers to other venues too.