Boab Prison Tree, Wyndham, Historical tree near Wyndham, Australia.

The Boab Prison Tree is a large hollow Adansonia gregorii (boab) just south of Wyndham, Western Australia, on the King River road near The Diggers Rest and the Moochalabra Dam. Its pale grey bark bulges into a wide base and is scarred with carved names and initials, among them "MUIR", "1957", "1988", "STAHL", "JW", "RJW" and "PR". A rectangular opening cut low on the trunk leads into the hollow interior; a small dark hollow sits near the base, and sparse branches with small green leaves extend above.

In the 1890s, authorities discovered the hollow nature of this tree and created an entrance to establish a temporary detention space. It served the local police as an improvised prison location for those arrested in the remote region.

The tree carries carvings made by visitors over many decades, with names and initials left behind as a form of remembrance. These marks tell the story of the long tradition of people traveling to see this remarkable location.

The tree is accessible by car via King River Road south of Wyndham, located near The Diggers Rest. A four-wheel drive vehicle is necessary for this remote route, so it's wise to check road conditions before visiting.

This tree was actually used as a natural prison for inmates, while other similar trees exist only in local legend. The practice was unconventional, but at this location the remote surroundings provided the most effective containment.