Firefighters were called out to another arson attack at the former Ski Village in Sheffield.
Crews spent three hours tackling the blaze at the Parkwood Springs site on Saturday afternoon into early evening.
They found a wooden outbuilding engulfed in flames and some matting on the former ski slope also alight.
The former alpine ski complex was destroyed by fire in April 2012.
Since then it has been hit by a series of arson attacks, vandalism and thefts.
The ski village opened in 1988 and was the largest artificial ski resort in Europe, attracting 180,000 visitors a year in its heyday.
It was built at a cost of £2.5 million by city entrepreneur John Fleetham but is now a derelict crime-plagued site.