One of the truly great venues for the performing arts anywhere in the world, Paris' new opera house actually managed to inspire some neighborhood protest during its planning and construction. Pretty much everybody is a believer nowadays though. Check out the website for upcoming shows, it might even make sense to plan a trip to Paris around one.
The Opéra Bastille is a modern opera house in the 12th arrondissement of Paris, France. Inaugurated in 1989 as part of President François Mitterrand's Grands Travaux, it became the main facility of the Paris National Opera, France's principal opera company, alongside the older Palais Garnier; most opera performances are shown at the Bastille along with some ballet performances and symphony concerts, while Palais Garnier presents a mix of opera and ballet performances.
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Coulée verte René-Dumont
If you were a city planner in one of the great cities of our Earth and you discovered that a railroad right-of-way had been abandoned and would never be used again what might you do? Perhaps if you knew your stuff you'd convert it into a 4 mile long park, about half of which is elevated above street level on the old rail viaduct. This long narrow park pretty much allows the visitor to walk in carfree bliss from Place de Bastille to the Bois de Vincennes.
An indoor sports arena that seats around 17,000 for sports and slightly over 20,000 for major concerts; formerly known as Palais des Omnisports de Paris-Bercy and Bercy Arena. Home to numerous concerts and major sporting events, most notably the Paris Masters tournament on the ATP World Tour in men's tennis.
La Cinémathèque française
Housed in modern building designed by Frank Gehry, contains a cinema showing French & international films, temporary exhibitions lasting about 6 months, Museum dedicated to the history of cinema. Exhibitions are fairly visual.
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.
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.
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.