Prague Castle holds the Guinness World Record as the largest ancient castle complex on earth, stretching across a hilltop above the Vltava River and encompassing palaces, churches, gardens and a lane of tiny medieval cottages. Settlement here dates back to the Neolithic period, though Prince Borivoj founded the castle itself in the 800s on a site already used for pre-Christian Slavic ritual.

Its most extraordinary resident was Emperor Rudolf II, who moved the imperial seat to Prague in the 1580s to escape the approaching Turks, then filled the castle with a collection of 3,000 artworks, a court of astronomers and alchemists, and Europe's first zoological garden, stocked with tigers, leopards, pythons and an orangutan.

VoiceMap's audio tour, led by an art historian from Charles University, moves through the entire complex, tracing the castle's layers from Romanesque foundations to Rudolf's Renaissance court, and connecting its architecture to a thousand years of Bohemian history.