A sandstone complex on the rise above the CBD that began life in 1831 as a convict chapel, was converted to a women's prison and then a men's gaol, and ended as the Supreme Court of Tasmania. The dim, vaulted underground tunnels connect the cells to the courts and to the execution yard — guides take you through them by lamplight and the story is genuinely grim.
The standard 90-minute tour is excellent — knowledgeable, slow, unsensational. The evening Ghost Tour runs Thursday to Sunday and is the popular option (and a good one even for sceptics). The site is run by the National Trust and the ticket includes the courtroom, the chapel, and the cells.