Back in 2007 random metal spikes appeared on a beach in Devon.
The plan was to remove them, but as soon as they were there, they had dissapeared again.
Some of the recovered coiled spikes, which vary in size, will be given to the North Devon Museum in Barnstaple.
Mr Corin said: “The spikes were first exposed back in 2007 but before we had a chance to remove any, the Pebble Ridge had swallowed them up again. This time we’ve managed to remove the majority of them – about two tonnes worth.
“The coils would have ripped off the tracks from any tanks, rendering them immobile.”
Northam Burrows Country Park is a 253 hectare grassy coastal plain at the mouth of the Taw and Torridge estuary, which includes the Pebble Ridge, a bank of cobbles which is part of Westward Ho! beach.
Gaye Tabor, Torridge District Council’s lead member for the natural and built environment, said: “It’s fascinating the secrets Northam Burrows is still withholding from us.
“It’s such a wonderful natural resource for Torridge, enjoyed by people of all ages, and never fails to amaze.”