Manons place has a wonderful city-view with the sacre coeur in sight. A good place to sit and watch the sun go down. The place has a nice home-feel, very nice to relax after a day in the city.
There are special spots in the area to sit and have a coffee or lovely lunch (le pavillon des canaux, la cantine Bretonne or l'avenue for example). Le parc des Butes-Chaumont is a great place to stroll around or to have a picnic. You can also easily take the metro nearby to go the center or take a bike.