The following history is from Wikipedia:
The Wiener Prater is a large public park in Vienna's 2nd district (Leopoldstadt). The Wurstelprater amusement park, often simply called "Prater", stands in one corner of the Wiener Prater and includes the Wiener Riesenrad.
In 1873, a World Exhibition was held in the Prater, for which a large area of land was set aside, centered on the Rotunda, which burnt down in 1937. This land now houses the Messegelände (exhibition centre).
The overall area of the park has also been reduced by the building of the Ernst-Happel-Stadion (Austria's national stadium), the Südosttangente (Austria's busiest piece of motorway) and racecourse.
From Chapter 10 of So Faithful a Heart:
The hot July sun bore down on the lawn as Mozart and his little family lazed under a large Linden tree near a pond at the Prater. The park was abuzz with activity: children playing games on the lawn, mothers pushing their infants in prams, couples sitting on blankets, eating Italian ices, roast chicken, fresh strawberries, and fresh mozzarella cheese with basil on sliced tomatoes, drizzled with olive oil.
Constanze watched as baby Karl, who was a little over ten months old and who was already beginning to toddle, pulled himself up on the lawn and tried to chase the butterflies that flitted by, only to fall onto his backside when his chubby little legs couldn’t carry him fast enough. This was the indolent summer Mozart had promised himself and his family and he was enjoying it to its fullest with no guilt or remorse. As he lay upon the blanket in his stocking feet, having kicked off his shoes, he read, another luxury that he’d promised himself.
This is the Rondo movement from Mozart's Clarinet Concerto in A major. I chose it for this post because, to me, it evokes a cheerful stroll through the park.