The caves were carved by patience and water. For 500 million years, rain has trickled down through beds of dolomite, a soluble rock that dissolves grain by grain over unimaginable spans of time. The water hollowed out passages and vertical shafts, some plunging as deep as 75 metres into the earth. Where the roofs of those chambers grew thin and finally collapsed, sinkholes opened at the surface - circular wounds in the flat tableland. A 1970s aerial survey counted 80 confirmed sinkholes and 67 more possibilities scattered across the region, with the densest cluster gathered here, near Camooweal. To stand at the rim of the Great Nowranie Cave is to look down into deep time itself.

These are not static holes in the ground. They live by the rhythm of the seasons. Through the long dry, the sinkholes sit quiet and dusty, their floors far below in shadow. Then the northern wet season arrives, and the Georgina River system swells, and water pours into the openings until some of the caverns flood entirely. The park itself - 13,800 hectares of woodland and grass - shifts with the same pulse. Waterbirds gather at Nowranie waterhole, where a single picnic table marks one of the few human concessions to comfort in this remote country. The land empties and fills, empties and fills, as it has done for ages.

Long before Europeans reached this corner of Queensland in the 1860s, the Indjalandji-Dhidhanu people lived across the wider Camooweal country, using the land and the Georgina River as a trade route to their neighbours. To them the sinkholes and waterholes are not geological curiosities but sacred ground, woven through with Dreamings - the journeys of ancestral spirits who shaped the landscape and left meaning in it. The central Dreaming here is the Wiliyan-ngurru, the ridge-tailed monitor, the small spiny goanna whose name the park now carries. In 2021 the park was formally renamed Wiliyan-ngurru National Park, returning the country's own word to the maps.

There is a powerful temptation to climb down into a place like this. The park asks you to resist it. The shafts are deep, the rock can be unstable, and what looks like an inviting descent can become a trap with no easy way out. Public entry into the caves themselves is no longer permitted. Instead, a designated viewing area at the Great Nowranie Cave gives a safe vantage point - close enough to feel the cool air rising from below and to sense the scale of the void, far enough to keep you on solid ground. It is enough. The drama of this place is in the looking.