There was plenty to explore immediately around Cesky Krumlov, but I wanted to get farther out into the countryside, so I rented a bike for a day. The bike available turned out to be an Author, which I assume is some local central European brand. Not much of a bike, but it served its purpose for 50km or so. Tires with air (to say nothing of tread) would have been nice. The following day I saw another bike-rental outfit with bikes that at least looked better...
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The bike is parked in front of an overlook towards Divci Kamen, a 14th century castle built by the Rozmberk family, accessible after a harrowing descent of a rocky path. Harrowing mostly because I really didn't like the looks of those tires...