What is "wiltja"

n. A semicircular Aboriginal dwelling, intended as a temporary shelter from the heat of the sun.

Wiltjas are shelters made by the Pitjantjatjara people and other Indigenous Australian groups such as yankunytjatjara people/groups. They are temporary dwellings, and are abandoned and rebuilt rather than maintained. Open and semi-circular, wiltjas are meant primarily as a defense against the heat of the sun, and are not an effective shelter from rain.