The heat is taking its toll. There's no cooling facilities in any of these apartments, and this particular one is exposed to the sun all morning. I'm not sleeping well and not feeling up to big adventures. Took the U-Bahn to the Prater station, out in the same direction as yesterday, but not so far. The Prater is a big woodland park, though not so unspoilt as the equivalents in Munich or Frankfurt. The Austrians in particular don't seem concerned about running a freeway over their parks, or dropping in a museum, a gallery, a research station or even a little community here and there. I guess the parks are big enough to take it. I set off to do the long walk around, which advertised itself as 9 kilometres. It was fairly well signposted, although at one point I wasn't sure whether to head for the Gasometer or the Lusthaus. The Lusthaus sounded more interesting, so I went there, but it turned out to only be a restaurant. And I saw another deer, briefly, just off the path.