Want to explore Prague at your own pace? When you download the POPGuide app, you can wave goodbye to big tour groups and discover the incredible history of the city at your own convenience. From the largest medieval castle in the world to the Charles Bridge and the Astronomical Clock, you'll find fascinating stories about Prague's best landmarks in your audio guide. And that's just the tip of the iceberg – the audio guide app (available in six languages) also acts as an offline map that suggests the best walking tours and photo spots!