A huge diamond containing some of the largest letters in the world, etched into the Nullarbor Plain limestone. Created in 1965 as an advertising ploy or emergency airstrip. # Why Go 🗺️ Observe a massive geoglyph visible from satellite imagery 🛣️ Unique roadside attraction on the Eyre Highway 📜 Historical curiosity from the 1960s # Why Avoid fading over time, less clear from ground level ✈️ No longer a major aerial landmark # Tips 🛰️ Best viewed via satellite imagery like Google Maps/Earth. 📍 Located near the small roadhouse community of Caiguna.