An inflatable unicorn, trainers and WKDs were among the items seized by police this weekend.
A dispersal zone was put in place at East Quarry in Appley Bridge, West Lancashire, due to the number of people putting themselves at 'serious risk' by visiting the site.
The water-filled quarry, which is on private land, attracts trespassers who break onto the site to sunbathe and swim during warm weather.
This is despite repeated warnings from the authorities for people to stay away from the quarry which has claimed the lives of two teenagers since 1999.
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A dispersal zone gives police the power to ask a people to leave the area and confiscate anything they believe could be used to cause antisocial behaviour.
Ormskirk and Rural West Lancs Police posted a picture of the items they confiscated from teenagers at the site over the weekend, including WKDs, trainers, towels, speakers and an inflatable unicorn.
A police spokesperson said it came after a patrol car was damaged and several people were searched under the misuse of drugs act.
They said: "If anyone's teenagers have returned home without their belongings today, this pile is what we have found or seized from people breaching the dispersal notice at Appley Bridge.
"If you would like to attend Ormskirk Police Station to collect their property, ask for the on duty Neighbourhood supervisor, we will just need proof of ID and a discussion with your child about the damage caused to the Police car.
"During today's shift we have issued a large number of dispersal notices, several parking tickets for people parking illegally around the quarry and searched numerous people under the misuse of drugs act. Sgt Darren."
