Map showing extent of Doggerland, a vast territory in northwest Europe that was above sea level 16,000 years ago, and the territory's diminishing size as ice melted and the North Sea rose. Illustration by Claus Lunau/Science Photo Library.
And that's just the north sea. I'd like to see what the rest of the map looked like in the Mediterranean, the Spanish peninsula and most likely ... the many islands that would have dotted the Atlantic.
Also, a henge isn't a stone circle. It's a ring-shaped earthwork. What we think of as Stonehenge is a ring of Megalithic standing stones (not all standing stones are in a circle incidentally) in the middle of a henge.
Doggerland was discovered when a dredging trawler brought up a block of peat and they found a stone tool inside. They were, of course, initially mystified about how a stone tool could end up inside peat under the ocean.
I went to the area of Texel this year in my country, which used to be part of Doggerland. (Texel is called an island but technically it's not, but that's for a different time).