There are many Lafayette buildings, for the view, ...

There are many Lafayette buildings, for the view, make sure you enter the one with the dome. Check satelite view to see. There's a glass bridge on the top floor so you can view the entire mall under the dome, it's free of charge. Then, you can go to the rooftop marked 'Rooftop Terrasse' or 'Terrasse'. There you can get the spectacular view of the city of Paris and see Eiffel Tower from a distance. It's also free of charge. Make sure to check the weather forecast before coming!