Police have issued a warning following reports of a vandalism at Bradda Head.
Officers say the Department of Environment, Food & Agriculture has raised concerns after two entrance gates to the old mine workings have been damaged.
The constabulary says DEFA takes these measures to coron off such areas because there could be danger to life or limb for those who go into such areas without the right equipment and knowledge.
Authorities are also warning it's an offence to trespass and are asking people to stay away.
Bad weather means two ferry crossings cancelled
Commissioner hits out at "nuisance" campervans
Livestock worrying consultation ends this week
Warning over possible ferry disruption tonight
Department told to provide new FOI response to Visit Isle of Man query
700 sign petition to keep Castletown street sweeper
Mystery after oily birds found in Peel
Laxey move announced for well-known jewellers