Thunderbolt!

I went on a bit of a pilgrimage to get a shot of this in my local park.

It's a Glacial boulder that was carried down to the Midlands on ice from Wales during the last glacial around 18,000 years ago.

not so many years ago my mom sat me me on it and there she told me it was a thunderbolt that had fallen from the sky.
naughty mom!