The southwestern castle city of Cesky Krumlov is one of the Czech Republic’s finest medieval sites. Its Old Town is a UNESCO-designated World Heritage Site, a maze of twisting alleys built around the extensive Cesky Krumlov castle. Saunter through crooked, cobblestone streets on foot and soak up the atmosphere of this impeccably preserved medieval gem. The gushing Vltava, popular with rafting enthusiasts, darts through the town.