Parc de la Villette is fifty-five hectares of open ground in north-east Paris, laid out around structures rather than lawns. Twenty-six red steel pavilions stand across it on a fixed grid, and you can walk from one to the next in a straight line. The Grande Halle, a surviving iron cattle hall, holds concerts and fairs; the Cité des Sciences fills a huge shed at one end and the Philharmonie concert hall stands at the other. The Canal de l'Ourcq cuts straight through the middle of it.
Cattle were killed here for more than a century. The abattoirs opened in 1867, and the beef and mutton of Paris came through these gates until the wholesale trade moved out to Rungis in 1969. The last ox was killed here in 1974. That left the state a walled site of iron halls, and a competition was held to decide what should replace it. Hundreds of entries arrived from more than forty countries. Bernard Tschumi won in 1983, and President Mitterrand opened the result in 1987. What Tschumi proposed was not a garden but a system, which is why you walk between red pavilions on a grid rather than along the lawns and borders a park would give you.