Karlštejn Castle Day-Trip is a real time commitment — fit it in only if it's a priority.
Allow Half to full day (4–6 hrs).
The easiest castle escape from Prague — a short train ride and a leafy uphill walk to a dramatically-sited fortress, with a stunning gilded chapel on the premium tour. The catch: the village approach is a gauntlet of souvenir stalls, the best interior (the Holy Cross chapel) needs the pricier, must-book-ahead Tour II, and the standard tour can feel thin. Pleasant but touristy.