OneGuyFromBarlick

That was brilliant..... Can we have another one please?

That was a good one Kev. Your `think smaller' clue triggered my brain onto a different track and I was trying to envisage looking inside things. Then, yes, those holes were intriguing and combined with what looked like rough wood suddenly it all fell into place. A real brain teaser, thanks!

Now then, what's going on here and what is the location?

The first thing that came to my mind was erecting shuttering for concrete on the London Barrage.....

Nothing to do with a barrage but it probably has concrete above it among other stuff.

Is it building the sarcophagus at Chernobyl?

Looks like they are forming a corrugated steel culvert

That makes sense Tom.....

Stanley wrote: ↑19 Dec 2023, 10:50 Is it building the sarcophagus at Chernobyl?

If it is that those four blokes will almost certainly not be with us any more.

Not the sarcophagus at Chernobyl. Corrugated steel yes, but culvert no. It's not just part of a big structure but something very special and its in England.

Thames barrier?

No, and it's not a barrier.

It's got to be the form work for a tunnel then and the only one I can think of is the one near Stonehenge.

Channel tunnel?

It has an early 1970s look to it....not much Health and Safety going on!

The main project took 10 years starting in the 1960s but what you see in the photo is the final stage, so well done on the era, Wendy!
Not the Channel tunnel. Neither road nor rail go under it but there's a motorway very close to it.
Not Stonehenge but Stanley has given the rest of you a good clue!

Is it the subways to the farm on the m62

I like that Tom! I remember it well.....

Not a subway to the farm on the m62, Tom, but you're getting closer. The main `mystery object' is underneath a major motorway and there is a tunnel providing access. It's further south, too.

Damn I was patting myself on the back

Canal under spaghetti junction

Wildlife tunnel under the M25?

Not a canal under spaghetti junction - no canals or rivers or railways involved.
Nothing to do with wildlife.
There is a tunnel but that's only for access to the main attraction.
The work in the photo went on in the 1960s but the main attraction dates to a couple of thousand years earlier - that gives a you a good clue!

Dover Castle?

Sorry Gloria, but no, Dover Castle is very modern compared with this. And its nothing to do with fending off enemies before you all start listing castles!