Tree! Not Thing.
I think that title belongs to the myceleum network under Dartmoor.
The Alton Prior Yew has a sarsen embedded in its roots.
There is a natural drift of sarsens in the area.
PeteG

Thanks ftc - amazing (> maybe the oldest living thing in Europe <).

Years ago, I trekked up the mountainside of Yakushima Island in southern Japan - it took me all day through steamy sunshine and tropical downpours but at the top of the island are some of the oldest life forms on the planet - huge cedar trees dating back some 5,000 - 7,000 years ( http://373news.com/2000yakushima/yakusimE.htm )

I'll never forget being in the presence of those silent travellers through time...

Fungal spores found in Oetzi's boots were grown, so they must be the oldest verified living thing in Europe.

5,300 years.