Photo: via Wikimedia Commons, CC BY-SA 3.0
There are many beautiful footpaths, a Buddhist Temple, and a lake with rowboats available for rental (about €10 as of 2009). The lake has many different kinds of birds, and islands accessible by footbridge.
The Bois de Vincennes, located on the eastern edge of Paris, France, is the largest public park in the city. It was created between 1855 and 1866 by Emperor Napoleon III.
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A former fortress and royal residence at the edge of the city, alongside the Bois de Vincennes. It was largely built between 1361 and 1369, and was a preferred residence, after the Palais de la Cité, of French kings in the 14th to 16th century. It is particularly known for its "donjon" or keep, a fortified central tower, the tallest in Europe, built in the 14th century, and for the chapel, Sainte-Chapelle de Vincennes, begun in 1379 but not completed until 1552, which is an exceptional example of Flamboyant Gothic architecture. Most of the building is now open to the public.
Housed in an amazing Art Deco building, purpose-built for the 1931 Colonial Exhibition, featuring an elaborate frieze across the front facade that depicts the achievement of French overseas territories. It houses an Aquarium and an Immigration Museum. The aquarium can be seen in about an hour and is popular with families with small children.
Cimetière de Picpus
A must for anyone interested in the history of the American Revolution. This small cemetery includes three mass graves from the French Revolution, plus a section that includes many of France's most noble families that lost members during the French Revolution and consequently have a continuing right to be buried there. In the farthest right hand corner is the tomb of General Lafayette, the friend and fellow soldier of George Washington. Beside him is his beloved wife plus other members of her family, the de Noailles, who were almost completely wiped out during the French Revolution because of their closeness to the Court. Since 1834 the American flag has apparently flown continuously over his grave, even during the German occupation of Paris during World War II. Well worthy of a visit.
For a taste of the French countryside, a visit to Bercy Village brings to life the spirit of market shopping inside Paris.
Between the River Seine and the rail yards attached to Gare de Lyon and Gare de Bercy is a green space which would seem pretty huge if the 12th weren't also the home of the Bois de Vincennes. The park is a good place to hang out waiting for the line to form for sporting events and concerts at AccorHotels Arena.
Nestled in the centre of the Parc Bercy (below) is a lovely, and truly peaceful, garden with several waterworks and other high-quality landscape-art pieces. If you are one of the many people visiting the 12th on business it would be well worth an hour of your time between meetings and dinner to explore the mound, the fountain, and the bridges, and to watch children play in complete peace, much like the peace to which the garden's namesake dedicated his life.