In Paris, a unique green space stretches for four miles through the city, using an old, abandoned railroad right-of-way. This former railway has been transformed into a linear park, offering a peaceful escape from the busy streets below. About half of this park is perched above the city on the old rail viaduct, allowing visitors to stroll high above the traffic and noise.
The park, known as the Coulée verte René-Dumont, starts near the Place de Bastille and extends all the way to the edge of the Bois de Vincennes. Along the way, the path passes through gardens, under shady trees, and past colorful flowerbeds. The elevated section provides sweeping views of Parisian rooftops, giving visitors a new perspective on the city.
This calm, car-free route invites people to walk, jog, or simply relax on benches along the way. The park is popular with locals and visitors alike, providing a quiet retreat right in the heart of the city. Converted from a space once dedicated to trains and industry, the Coulée verte René-Dumont now serves as a green artery connecting neighborhoods and people across Paris.
Source - https://en.wikipedia.org/wiki/Coul%C3%A9e_verte_Ren%C3%A9-Dumont