Purnululu is the Kimberley's most iconic sight: a 240,000-hectare World Heritage site containing the Bungle Bungle Range, a formation of sandstone domes banded in orange and black — the orange from silica, the black from algae — that rises improbably from the flat surrounding savannah. From the air (helicopter flights depart from Kununurra and from the park itself) the domes look almost artificial; on the ground, walking among them, the scale only gradually becomes clear.
The main walks in the park are Cathedral Gorge — a short walk into a spectacular amphitheatre cave — and Echidna Chasm, a narrow slot canyon in the northern section. Both are accessible from a 4WD track that leads about 53 km off the Great Northern Highway. The drive in from the highway is itself part of the experience: the unsealed track runs through open spinifex country, crossing creek beds and giving views of the range rising ahead. Allow at least two full days in the park; many people stay longer. There is a campsite with basic facilities inside the park.
Getting here requires a 4WD vehicle and careful timing. The park is closed in the wet season (roughly December to March) and the road in can be cut by creek crossings at other times after rain. Helicopter flights from Kununurra (about 300 km north on the highway) allow day visitors without a 4WD. Give yourself at least a full day in the park if possible.