What tree hollow was used as a prison in Australia?

It was the hollow of a tree called the baobab that was used in this country as a prison in the nineteenth century. The second name of this tree is finger adansonia. It should be noted that this is one of the thickest trees on our planet. The trunk diameter of this tree can be up to eight meters. The maximum height of this tree is twenty-six meters. This tree has no growth rings. These trees can live for thousands of years. Fiber for fishing nets is made from its bark.