Is Edinburgh Castle haunted?
Scotland Reported haunting level 4 of 5

What actually happened
The castle endured repeated sieges and held prisoners of war in its vaults; St Margaret's Chapel is the oldest surviving building in Edinburgh.
The history
The fortress dominates Castle Rock and served as a royal residence, military stronghold, prison and national arsenal across many centuries.
What people report
Traditions include a lost piper beneath the rock, a headless drummer and unexplained sounds reported in former prison areas.
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
Castlehill, Edinburgh EH1 2NG, United Kingdom