What is the name of the rock formation also known as 'The Olgas'?

The rock formation also known as “The Olgas” is Kata Tjuta. The official dual name is Kata Tjuta/Mount Olga, while “The Olgas” is the older English name commonly encountered in historical writing and tourism.

Kata Tjuta is a group of 36 huge domes in the Northern Territory’s Uluṟu-Kata Tjuṯa National Park. Unlike nearby Uluru, which is a largely exposed monolith, Kata Tjuta consists of conglomerate: rounded cobbles and boulders cemented together in a sandy matrix. Weathering has shaped the formation into steep-sided domes and gorges.

“Kata Tjuta” comes from Pitjantjatjara and means “many heads,” an apt description of the clustered peaks. The alternative name derives from Mount Olga, the highest dome, which explorer Ernest Giles named in 1872 in honour of Queen Olga of Württemberg. Uluru lies roughly 25 kilometres away, but the two formations are distinct sacred places with their own Tjukurpa stories and cultural protocols.