I've been doing long walks along the Yangjae-cheon. The path itself is relentlessly straight and flat, and it goes for miles, but there are interesting sights that greet the attentive walker. One such sight is an amazing tadpole pond in which thousands upon thousands of spermatozoic tadpoles swim in massive black swarms that remind me of the tentacled machines that poured into the Zion docks in "The Matrix Revolutions." Another sight is this rather eldritch-looking set of stairs—a sluice slicked over with algae:
I could stare at those steps all day long. And the algae definitely remind me of chimichurri.