Strange ancient monument found in France

[Imperial Dave]

https://www.indy100.com/science-tech/neolithic-monument-discovered-marliens-2669212357

Interesting find....

[Nick Harbud]

Are you sure it is not an early bidder for an Olympic stadium?  They built three rings before being informed that they were no longer under consideration.

 

[Keraunos]

Interesting, indeed, as is the idea of an Institute of 'preventive' archaeology 

[Imperial Dave]

Then HS2 came along....