Long before the tower, this headland had a name. The Arakwal people, part of the wider Bundjalung nation, call it Walgun, meaning 'the shoulder', and for thousands of years the cape and its waters provided both sustenance and spiritual meaning. Building the lightstation in 1899 to 1901 damaged sacred sites, a loss the modern record does not paper over. Yet the Arakwal connection to this place did not end with construction. Today the Arakwal are formal joint managers of the Cape Byron Headland Reserve, running educational programs at the headland that frame the lighthouse within a far older story. The cultural heritage here, as they put it, is not confined to the past. It is being practised now.

Through the 19th century, New South Wales strung its coastline with lighthouses, a 'highway of lights' guiding the busy colonial shipping that moved produce, passengers, and goods up and down a treacherous shore. Cape Byron was among the very last to complete that chain. The design fell to Charles Harding and engineer-in-chief Cecil Darley, who inherited the architectural language of the long-serving colonial architect James Barnet and adapted it with newer technology. Rather than quarried stone, they built the tower from precast concrete blocks, cast on the ground, hoisted into place, and rendered smooth, only the second NSW lightstation to use the method. The opening, set for 30 November 1901, was to feature a grand banquet attended by Premier John See, arriving by government steamer from Sydney. Bad weather delayed his ship, and the banquet went ahead without him. He opened the light a day late.

The light grew steadily fiercer over the decades. The original 1901 source was a concentric six-wick kerosene burner throwing 145,000 candela out across the water. In 1922 a vaporised kerosene mantle burner more than tripled that, reaching 500,000 candela. The great leap came in 1956, when the station was connected to mains electricity, its clockwork drive swapped for an electric motor and its burner replaced by a 1,000-watt tungsten-halogen lamp. The beam jumped to 2,200,000 candela, making Cape Byron the most powerful lighthouse in Australia, a distinction it still holds. On a dark night the loom of that light can be seen far out to sea, a steady sweep marking the corner of a continent.

What draws more than half a million visitors a year is not really the optics. It is where the tower stands. The Cape Byron walking track loops 3.7 kilometres through the surrounding reserve, climbing from the beaches to the white tower on its clifftop, and from the lookout the Pacific fills the entire eastern horizon. Migrating humpback whales surface offshore in winter. Dolphins ride the breaks below. The image of a small, well-proportioned white tower against an endless wild ocean has become one of the most recognisable in the state, a symbol of human persistence at the edge of a vast and indifferent sea. The keepers' quarters that flank it now house guests; the maritime museum and interpretive centre tell the rest.