The Boab Prison Tree is a large, hollow tree located in the town of Derby, Western Australia. The tree is believed to be over 1,500 years old and was used as a temporary holding cell for Aboriginal prisoners in the 1890s. The tree is 14 meters in circumference, and its hollow trunk has been modified to accommodate prisoners.

According to local history, the Boab Prison Tree was used as a holding cell for prisoners being transported to the Derby lockup. It is said that Aboriginal prisoners were shackled to the tree overnight until they could be transferred to the jail the next day.

Today, the Boab Prison Tree is a popular tourist attraction and is protected as a cultural site. Visitors can see the tree up close and learn about its history through interpretive signs and displays. The tree is also significant to the local Aboriginal community, who consider it to be a sacred site.