Legend says that it was a massive ice cream making vat, constructed by the Romans circa 74 AD. To supply visiting dignitaries and their legions whilst they were doing a tour of the Peak District using numerous B+B's along the way.
The vat supplied the Legionares with what was thought to be a medicinal supply of one cornetto or ice lolly as a prescribed daily allowance. This was as long as they stayed in the Peaks.
A teeth rotting revelation to an other wise mundane story.
We like to think it was built by skaters for skaters, with a checkered history of epic slides, grinds and slams to add to its slightly haggard and pattened character.