The Rocks occupies twenty-three hectares of Sydney Harbour foreshore where the First Fleet anchored in 1788, transforming a sandstone peninsula into the penal colony's first settlement. Governor Arthur Phillip ordered convicts to carve foundations from golden Hawkesbury sandstone, and by 1810 the district housed military barracks, bonded warehouses, and terraced cottages pressed against the harbour. The narrow laneways that climb Observatory Hill were not designed but emerged organically as convict labour gangs hauled stone and timber upward, creating a chaotic street grid that defied later colonial planners. Bubonic plague struck in 1900, prompting the New South Wales government to demolish entire blocks of workers' housing. A second wave of demolition threatened the district in the 1970s when the Sydney Harbour Bridge approach required clearance, but residents launched the Green Bans movement and forced heritage protection. Today eighty-five Georgian and Victorian structures survive, including Cadmans Cottage built in 1816 as the coxswain's barracks and now Sydney's oldest surviving residential building. Argyle Cut, a hand-carved tunnel through solid sandstone, required eighteen years of convict labour between 1843 and 1859, each chisel stroke visible in the hewn walls. The Rocks Historic Quarter now operates as a living archive where Georgian bond patterns in brickwork and hand-split roof shingles coexist with contemporary galleries and laneway bars. Foundation Street traces the original shoreline before reclamation pushed the harbour edge two hundred metres north. Playfair Street climbs past the 1840s terrace row where Irish and Scottish stonemasons lodged after completing their sentences. The Argyle Stores, constructed in 1826 as bonded warehouses for rum and wheat, now shelter boutiques beneath massive ironbark beams and convict-laid flagstones. Archaeological digs beneath Gloucester Walk unearthed clay pipes, rum bottles, and iron shackles that now occupy museum vitrines. Convicts and the rocks sydney walking tour experiences traverse this palimpsest daily, following flagstone paths laid by chain gangs and pausing at interpretive plaques that mark execution sites and riot flashpoints. The district opens to harbour breezes at Dawes Point, where Lieutenant William Dawes established the colony's first astronomical observatory in 1788, his sandstone footings still visible beneath the Bridge pylon. The Rocks remains free to explore, its sandstone laneways and Georgian facades accessible from dawn to midnight, though guided heritage walks offer narrated context that brings convict-era Sydney into sharp relief.