The medieval Sinhalese kingdom at the absolute peak of its architectural and artistic ambition – a compact, well-preserved ancient city where the Gal Vihara’s four colossal Buddha figures, carved from a single granite face in the 12th century with extraordinary compositional skill, represent one of the high-water marks of Sri Lankan cultural achievement. The site is best explored by bicycle through the royal quarter, past the massive Parakrama Samudra reservoir, the Vatadage circular relic house, and the various palace and temple ruins that together tell the story of a civilisation that produced remarkable things while much of the medieval world was still in darkness.