Australia Boab Prison Tree, Wyndham

the Boab Prison Tree, Wyndham is located just outside of Wyndham by the King River: 15° 37′ 49.8″ S, 128° 5′ 42″ E

The tree has a history to be actually used as a overnite prison:
"When blacks were bad, in the 'nineties, this tree was used as a prison. The holes in the limbs indicated that it was hollow, and the police cut out an opening and had a cell with a capacity of more than 100 square feet, where the natives were locked up at night.[1]"
"Giant Bottle Trees.". The Queenslander. National Library of Australia. 26 February 1931. p. 54. Retrieved 11 January 2012.