I've arrived in CZ during a heatwave, so sightseeing has become an endurance sport in its own right - 24km walking in 35 degrees sunshine, tourists scurrying for shade, parasols and ice creams.
The traditional hot spots of the astronomical clock, Charles bridge and the castle were predictably swarming with tour groups beetling along behind guides wielding a variety of distinctive identifiers, but aside from that nowhere seemed crowded - I visited the Communism museum (disappointingly lightweight), Meda gallery (disappointingly brief) and Miniature (microscopic) art museum (downright amazing), Vitkov national monument, Zizkov TV tower, Vysehrad castle, ate some goulash, drank some beers, took a tram, detoured for various amusing sculptures, parks, churches, and gradually became desensitized to how pretty the whole city centrum is. Amazing that it escaped damage not only in the wars but also avoided the worst of the soviet architects - although they did have a field day building concrete apartment blocks in the suburbs. Anyway, squeezed in as much as possible and now on the way east to Svitavy to play 5 a side football and acclimatize a but more before the tour starts for real...