One from yesterday, drone got blown slightly off centre as the wind was high (this was from about 380ft) but didn’t turn out bad. Definitely need to revisit when the weather improves
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Where’s that @ ?
Between Rottingdean and Falmer on the South Downs 
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Nice, unusual nice 
I think the road adds to it, a minor adjustment in image editor to make it straight, and perfect imo.
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What is it?
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A good question. I have been trying to find out for the past hour. Google Maps location is here and it existed in 1875 according to this old map.
It is 14m or 45ft across which is huge. Too big for a well. And tunnel air shaft perhaps? An old mine?
@clinkadink i see a YouTube video coming 
Let me know when your going, I’ll control the safety ropes / harness 
Couldn’t be a dew pond could it? Does it definitely go into the earth like a mine shaft, or could that be the dark surface of water? Sometimes dew ponds have a built up perimeter as in your photo. Interesting!
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Could be. It’s not my photo though. It’s @ThorTDL Torsten’s.
Looks like a metal pipe on the bottom left 
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Oh OK. And replying to my own question, which is quite sad…if you enlarge the photo I think it looks like water especially on the top part. The tracks leading to “it” could be regular animal visits for drinking.
Or…?!?
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I assumed @ThorTDL would know since he photographed it. Interesting that it’s on that old map from 1875.
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Sign me up to the list of intrigued people please 
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According to LiDAR, it is filled with something, i.e. it doesn’t appear to be an empty pit or shaft.
It doesn’t look like water, that would appear perfectly flat with LiDAR.
This is what water looks like with LiDAR … like a perfectly flat sheet of glass …
Have to wait to see if Torsten @ThorTDL knows more
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Water? Balsdean pumping station is about 2km SE
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The suspense is killing me! 
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Maybe, but it’s not like any other water I’ve seen on LiDAR. Maybe it’s muddy, pond weed infested water 
Or a ventilation shaft 
to underwater reservoir
Same I’ve been on google, YouTube, found some Roman burial on the South Downs, not the answer tho,