Uluru
Uluru is a large rock in Australia, held sacred by the Australian Aborigines.
History
Dingo and Matrix met with the Shaman here, after their battle with the Tazmanian Tiger. While they were there, Robyn Canmore confronted them and coerced them into joining the Redemption Squad. ("Strangers")
The Spirit of Destiny listed Uluru among its many hosts making up the Stone of Destiny. ("Rock of Ages")
Real World Background
Uluru is also known as Ayers Rock (named after Sir Henry Ayers, one of Southern Australia's prime ministers). Despite its name, it is not actually a rock, but an enormous piece of sandstone.