Montmartre

Montmartre is a district for and from artists. You can stroll over the market below the church of Sacré-Cœur to see some fine art. There are numerous cafés along the small streets. Take a café au lait, a croissant and enjoy the music of the street musicians. There are also artists who will paint you as a souvenir. It is a busy spot, but that is kind of lovely around here.

With around 400 feet the hill of Montmartre is also the highest natural elevation in Paris.

Montmartre is the name of the 18th arrondissement of Paris. The hill in the north of the French capital, with its imposing white basilica, is the highest district of Paris. The Parisian artists' district of Montmartre has a lot to offer: in addition to a great view of the entire city, there are also hidden little vineyards, narrow cobblestone streets and numerous romantic places; not to mention interesting history, extraordinary stories and famous personalities who then and now live and have lived in Montmartre in Paris.
Source: help-tourists-in-paris.com/paris-entdecken/viertel/montmartre/paris-montmartre-20-tipps-zum-viertel-montmartre-in-paris

The scenery is just fantastic. The view over Paris makes up for the effort of the climb. Next to the Sacre Coeur is the famous painters quarter. Here you can look over the artist's shoulders in the market or just let yourself be painted. The artworks can also be purchased. It's worth a visit.