The path runs alongside the river that tumbles out of the underground lakes of Hinterbrühl. Actually this water is pumped out, otherwise these lakes would be un-navigable (people would bump their heads on the rocky roof).
Colder than usual, with hands shoved into coat pockets, I rolled into the bigger town of Mühlbach - where the train takes us into Vienna. But what's this long the wY? A path heading up a big hill towards a ruin on top of a cliff! Yikes! MUST climb up to that baby! So I did.
Here's the view back from whence I walked ...
Strolling along from what turned out to be an early 18th century folly (but a pretty intriguing one), saw me smack in the middle of the Vienna Woods. WHO WOULD HAVE THOUGHT???