Kata Tjuta — the "Olgas" of older maps — is a cluster of 36 dome-shaped rock formations 36 kilometres west of Uluru. The tallest dome, Mount Olga, rises 546 metres above the plain, about 200 metres higher than Uluru itself, and geologists believe the whole formation may once have been a single block much larger than the more famous monolith next door.
The Valley of the Winds walk (7.4 km loop, 3 to 4 hours) is one of the best hikes in central Australia, weaving between the domes through narrow passes and into wide valleys with views out over the desert. The shorter Walpa Gorge walk (2.6 km return) follows a streambed between two of the largest domes and is good in the heat or for an early-morning warm-up. The Karu and Karingana lookouts on the longer walk are closed when temperatures exceed 36 degrees.