The answer does not seem so obvious!
Unusual
At the origins of Paris, a source that springs from a valley in Côte-d'Or. A domain attached since 1864 to the city of Paris!
(Français) Un escalier d'apparence banale, pourtant symbole de l'une des plus importantes journées de l'histoire de France : le 10 août 1792.
A gift of nature that gives the basilica its particular whiteness.
When the organs of the royal family were used in the 19th century for paintings. Myth or reality ?
A superb example of industrial architectural creations at the end of the 19th century.
A work of art in the very busy rue Rambuteau made by Max Ernst, one of the most important artist of the 20th century.
An artificial island that has known rather unlikely projects.
A museum whose history is probably as rich as its works !
(Français) Dans le 16e arrondissement, le plus ancien laboratoire d'essais aéronautiques toujours en état de marche.