This isn't new, but I'd never seen it before, and figured that many of my readers hadn't either. The world's only rotating canal lock. There's more info at the usual source, of course. It's a pretty clever design.
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This page contains a single entry by Rand Simberg published on March 4, 2008 10:32 AM.
Haven't been there but saw it in action on Discovery channel, very elegant and efficient, somehow reminds me a bit of the dutch wind-powered walking sculptures of Theo Jansen.