Coca-Cola billboard, Illuminated billboard in Kings Cross, Sydney, Australia

The Coca-Cola billboard hangs above the corner of William Street and Darlinghurst Road, attached to the Zenith Residences. It has two parts: on the right, a red-and-white neon sign 21 metres long made of 88 vertical red tubing bars, and on the left, a flex-face sign added in 1990. Together they measure 41 metres by 13 metres.

The red and white neon sign was erected in 1974 above the William Street and Darlinghurst Road junction; the flex-faced left panel was added in 1990. In 2004 the left side first advertised a non-Coca-Cola product, the video game Halo 2. The original sign was removed in 2015 and replaced by LED tubing, switched on 15 September 2016; the old lettering was auctioned for $100,700 for the Wayside Chapel.

The sign is known as the Gateway to the Cross because it is visible along the whole of William Street, the main road in from the CBD. Many people assume it is heritage listed, but it is not. The hyphen from the old lettering now sits in a Christmas light display in Lithgow.

The sign hangs above the junction of William Street and Darlinghurst Road, attached to the Zenith Residences. Anyone entering Kings Cross from William Street or Darlinghurst Road passes directly beneath it, so it is seen on foot rather than from a distance. It is not heritage listed, despite what many assume.

The sign is often mistaken for a heritage-listed item, but it has never held that status. When the original lettering was replaced in 2015, the letters were auctioned for $100,700 for the Wayside Chapel, while the hyphen between the words went to a Facebook contest winner and now sits in a Christmas light display in Lithgow.