Is Port Arthur Historic Site haunted?
Australia Reported haunting level 5 of 5

What actually happened
More than 1,000 people died during Port Arthur's 47 years as a penal settlement, according to the site's own historical interpretation.
The history
Port Arthur operated as a British penal settlement for 47 years. More than 1,000 people died there during that period.
What people report
The historic site runs research-based lantern ghost tours built around accounts connected to the settlement's real residents.
That paragraph is reported tradition, not a claim about what is there. The history above it is sourced; the stories are recorded because people tell them.
Visiting
Arthur Highway, Port Arthur TAS 7182, Australia