Fort Victoria Country Park says part of its grounds has been littered - and left with fire damage - following a suspected party on Friday night (12).
The park's iconic Owl Glade is also missing, although it is hoped this was removed prior to Friday evening.
Posting on Facebook, it said:
"The area was littered with empty cider cans, plastic pints, empty vodka bottles and empty wine bottles..
"Whomever did this you do not deserve this park!!"