A mum-of-six said she was horrified to see exposed electrics inches away from a kiddies' ride her son played on at Pontins.
Andrea McDonald said crumbling brickwork around the socket revealed the metal casing and wires, close to to where son Benjamin sat on one of the few rides that seemed to be working at the Prestatyn holiday camp.
Ms McDonald, who was visiting the site for the third year in row for one of her kids to attend a dance competition, blasted it as 'dangerous and dirty'.
She said the family expected to have to clean their own chalet on arrival after previous years' experiences, but they were still shocked by what they discovered.
She said the chalet was 'filthy', with a dirty toilet brush left on the bathroom floor, a chicken bone under a coffee table, grease left in the grill pan, exposed screws sticking out a wardrobe door and cupboards that looked like someone had "chewed the corners off".
Pontins, bought out of administration by Britannia Hotels group in 2011, said they are "working continuously to make improvements" at their holiday venues.
Ms McDonald said: "We all expect to clean our chalets on arrival, it's a little joke between us all, that half the rides don't work and for the last few years, card machines haven't worked. However disrepair and things being dangerous isn't fair.
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She said the family, who paid around £260 to stay on Friday, Saturday and Sunday (November 2,3 and 4), left on Sunday night.
Ms McDonald added her sister had complained to the company on behalf of all of them about the facilities.
Earlier this year former guests at the site claimed the accommodation was worse than jail and in September the pool was closed for short time by Denbighshire Council after complaints were made about its cleanliness.
A spokeswoman for Pontins said: "The Park sites are working continuously to make improvements across all areas, carrying out necessary repairs and upgrading new purchases made within the accommodation to ensure our guests are comfortable during their stay.
"Further work will take place during the closed winter months. We take all our guests safety very seriously and our central Health and Safety team will be investigating and actioning accordingly should any areas require attention.
"We would welcome the guest in question to contact guestsolutions@pontins.com directly so we can investigate their concerns in detail."
Denbighshire Council has also revealed that it was forced to house homeless families at the resort in August this year.
The authority said it had no choice as it had no "alternative suitable accommodation" to house people who presented to them as homeless.
