Four young men risked their lives climbing Blackpool's Big One rollercoaster just to take selfies at the top.
The tourists from the south of England stayed in Blackpool Pleasure Beach resort after it shut last Saturday night.
When the gates were locked they put on their backpacks and climbed up the windswept metal structure before brandishing their selfie sticks with the hard ground 213ft below.
The four friends aged 18 to 20 were filmed by passers-by larking about at the very top of the structure - the most iconic part of the Pleasure Beach's skyline.
Park security and Lancashire Police arrested three of the four thrill-seekers as they clambered back down. The fourth was detained later.
Today Blackpool Pleasure Beach criticised the dangerous illegal climb.
A furious resort spokesman described the unauthorised stunt as 'terribly dangerous'.
He added: 'At approximately 9.30pm on Saturday 22 July, Blackpool Pleasure Beach's uniformed security detained a group of criminal trespassers.
'The police were called immediately and they were then handed over to the Lancashire Constabulary.'
The £12m Big One was launched in May 1994 to huge acclaim by the family-run Lancashire seaside resort.
When it opened, Big One was both the tallest and steepest roller coaster in the world.
The gang were spotted by staff at the resort's Big Blue hotel who raised the alarm with security staff at the park, which closed that night at 7pm.
Not amused: Today Blackpool Pleasure Beach