Britain as the home of Atlantis has been claimed by many writers and not without undertones of nationalism by some of the British authors. Nevertheless, support for the idea has been offered by a number of the more disinterested researchers. Probably the first to advance this idea was John Wallis (1660-1703), who, in 1700, proposed that the Atlantis story had been corrupted over time and was a reference to the destruction of the landbridge that had existed between France and England, leaving a British Atlantis more isolated (The original Brexit!)(c). It was nearly a century before the idea was taken up by Thomas Pennant and then more than another century passed before Cooper, Spence, Beaumont and Calestani produced related theories. Fast forward to the 21st century, when Donald Ingram identifies the Wessex II culture as Atlantean and Melville Nicholls considers Britain to be one of the Atlantean islands referred to by Plato.
The precise location, the exact date and the probable cause of the destruction of Atlantis are the basis for a range of theories. There is general acceptance that following the deglaciation at the end of the last Ice Age vast regions of low-lying land that had linked Ireland and Britain to mainland Europe were gradually flooded.
One school of thought is that these flooded regions contained Atlantis, of which the most extensive was in the North Sea and is now known as Doggerland. Other offshore locations proposed for Atlantis are the Celtic Shelf (Gidon, Steuerwald & Koudroiavtsev) and the Irish Sea (Dunbavin). These lands had been settled and following the inundations, its inhabitants were forced to retreat to the higher ground of what is modern Europe and the British Isles.
David L. Hildebrandt in Atlantis-The Reawakening  proposes a reworking of the ‘Atlantis in Britain’ theory with some new perspectives. For me, his dating, location and identity of the Atlanteans do not ring true, particularly why Stone Age people in Southern Britain would want to launch an attack on Athens, over 2,000 miles away, a city-state that did not even exist at the time. Those early Britons did not have the wheel, yet Plato tells us that the Atlanteans had chariots!
E. J. de Meester on his now defunct website postulated a link between Stonehenge and Atlantis(b). After arbitrarily dividing Plato’s dimensions by ten, he suggested that the plain described by Plato lay in a rectangle between Salisbury and Chichester.
The Megalith Builders, who date mainly from the Neolithic Period, are frequently identified with Plato’s Atlanteans. Their remarkable structures were built between the middles of the fifth and second millennia B.C., a period that is compatible with the final days of Atlantis according to Plato. The building of megalithic structures in Western Europe appears to have ended just before the beginning of the Bronze Age – coincidence? Emmet Sweeney, however, contends that “the great Megalithic-building culture of Atlantic Europe and North Africa commenced around 1100 BC or perhaps a little earlier”! [700.208]
Proponents of the idea of a megalithic building Atlantis see the location and extent of the megalithic structures as agreeing with Plato’s description, particularly his reference to Atlantis being ‘beyond the Pillars of Heracles’. However, the location of the ‘Pillars’ at the time of Solon’s visit to Egypt, is strongly disputed. In fact, the only territory unambiguously named by Plato as Atlantean was in southern Italy and North Africa along with several islands of which there are many in that region.
However, there are many features in Plato’s narrative that do not conform to our current knowledge of the megalith builders. There is no evidence that they had writing, irrigation technology or the navigational skills to mount an attack on Egypt/Athens or any other characteristics ascribed to the Atlanteans by him.
On the other hand, if these attributes are just literary flesh applied to a skeleton of historical truth there is the possibility of a link between the Atlanteans and the megalith builders remaining.
Atlantis enthusiasts are quite happy to associate the megalith builders with Atlantis, as it provides something tangible to enhance the credibility of Plato’s narrative pointing to sites such as Stonehenge or the Maltese Temples. British researcher Robert John Langdon has gone further and proposed that the megalith builders originally came from Africa and settled in Doggerland at the end of the Ice Age, where they established Atlantis. When Doggerland was submerged they migrated to what is now mainland Britain, where they built Stonehenge as a memorial to Atlantis.
Megalith building in North Africa has been documented for over a century. The Hill of Graces by H.S. Cowper in 1897 concentrated on describing the megaliths in the region of Tripoli. The Mzora Stone Circle is a huge megalithic monument in Morocco and is considered to be the largest stone ellipse in the world. Further east the stone circle of Nabta Playa in Egypt had its importance further highlighted in a 2010 book by Robert Bauval & Thomas G. Brophy, Black Genesis. A 2012 illustrated paper reviews the range of megalithic monuments found across North Africa.(af)
While not a new idea, a megalithic connection with Atlantis has recently been given further attention by the French writer Sylvain Tristan who was inspired by Jean Deruelle and Alan Butler. More recently, Jean-Michel Hermans, a French ethnologist, also added support for a megalithic Atlantis. Alfred deGrazia also joined this club as well as the German author Helmut Tributsch who has added his support to the idea of a megalithic Atlantis, specifically locating its capital on the island of Gavrinis in Brittany. A similar claim has been made by Hank Harrison, who also believes that the Morbihan region was an important Atlantean centre if not the location of its capital. Further support for a megalithic Atlantis has been given by Walter Schilling who places Plato’s city in the Bay of Cadiz. Robert Temple has recently offered grudging support for the concept of Atlantean megalith builders(ac).
Iberia is also home to very many megalithic structures of varying types. Recently, lower waters in a Spanish reservoir revealed once more the impressive 144-stone Dolmen-de-Guadalperal, situated roughly halfway between Madrid and the Portuguese border(z). Efforts are being made to ensure its preservation before the water levels rise again.
As far as I am aware classical writers make no obvious reference to the megalith builders, nor has this omission been commented on by modern writers. However, the numerous indirect references to Atlantis by the same ancient writers are deemed inadequate, which seems consistent with a dearth of information regarding early history.
It appears to me that other questions that have not been definitively answered relate to the identity of the megalith builders, why they stopped building and what happened to them. Another thought is that if the megalith builders lived at the same time as the Atlanteans, is it not strange that both disappeared around the same time, or did they? My opinion is that we are probably confronted with two unrelated mysteries – the disappearance of the megalith builders and the demise of Atlantis.
Parallel with the megaliths of the eastern Atlantic seaboard are the megaliths of North America(ab), particularly those of New England(ag). Who built them and when? Are they evidence of very early pre-Columbian voyagers from Europe?(b)
An interesting article combining all the strange aspects of megalith building can be read online(c) which certainly offers food for thought. A paper(d) published in September 2013 gives a good overview of megalithic studies during the past few decades. Walter Haug’s well-illustrated website(k) offers a range of previously ignored megalithic sites in Germany.
Much nonsense has been written about the megalith builders, particularly on the Internet, where you find daft ideas such as attributing their construction to aliens(a). The suggestion that extraterrestrials had the technology to travel in space but when they land on earth they have to build observatories with stone is just silly. Why would they even need such crude observatories if they had the technology and astronomical knowledge to travel across the cosmos?
A valuable website dealing with the global spread of megalithic monuments is The Megalithic Portal established by Andy Burnham(g), which has regular updates. Other useful sites are Stone Pages(h) and Megalithic Ireland(i). Another site worth a look at is that of Sjur C. Papazian(l). There is also a site(j) dealing specifically with the dolmens of Corsica and Sardinia.
In the Middle East dolmens stretch in a line from the Caucasus(s)(p) to Yemen with a remarkable concentration of them in modern Jordan(m), a fact which prompted a former Dutch ambassador to Jordan, Gajus Scheltema, to write Megalithic Jordan. Jordan is also home to an ancient mysterious 150 km wall, which was 1-1.5 metres high.(u)
Dolmens are also found in more distant lands such as India(r), Korea(n)(v) and Japan(o). It is difficult to look at the worldwide distribution of dolmens and not consider the possibility of some form of global cultural diffusion! Rarely discussed are the widely dispersed megalithic remains found throughout the Pacific islands(q).
A remarkable theory is presented by John M Jensen Jr to explain the function of dolmens throughout the globe, namely that they were constructed to protect from attacks by dinosaurs! This suggestion is part of a paper that claims that humans and dinosaurs co-existed(ad).
Another unusual claim comes from Yair Davidiy, a Brit-Am promoter, who wrote on their website – “Dolmens and Megalithic Monuments originated in Ancient Israel. Jeremiah 31:21 says that the Lost Ten Tribes will construct a trail of Megalithic Monuments from Israel to their places of exile and evidence of this path will enable them to return. Such a trail exists! It is the Trail of the Dolmens from the Middle East to the West.”(ae) As far as I’m aware Davidy has not explained the huge numbers of dolmens in places such as Korea and Japan!
There is a well-illustrated website offering an overview of the megalithic culture of Western Europe and the Mediterranean(t).
In February 2019 the Smithsonian Magazine had a report telling us that “Bettina Schulz Paulsson, an archaeologist at the University of Gothenburg, reexamined some 2,410 radiocarbon dating results that have been assigned to Europe’s megaliths and put them through a Bayesian statistical analysis. Based on the picture the data present, Schulz Paulsson believes that the megaliths were first constructed by dwellers of northwest France during the second half of the fifth millennium BC.” (w)
Some years ago, the renowned English archaeologist, Aubrey Burl, concluded after twenty years of study that French immigrants had built Stonehenge(aa). More recently, Mike Parker Pearson, a leading Stonehenge expert, has also endorsed this idea of a French origin for megalith building(x).
Archaeologist, Robert Hensey in his insightful First Light [1766.9] has also noted that “Construction of Breton passage tombs is likely to have ended by 3900 BC, almost certainly by 3800 BC, and the most recent evidence from Ireland suggests that passage tomb construction had not yet begun on this island by that time.”
The interesting claims of Schulz Paulsson, who places the origins of megalithic construction in Brittany in the fifth millennium BC, may be challenged by a little-known counterclaim that tombs in the Ox Mountains in the west of Ireland have been dated to the seventh millennium BC(y). However, my personal view is that it would be more likely that the practice of megalith building would have spread from the east or south rather than from Ireland westward!
A number of megalithic sites situated around the world are reviewed on the illustrated megalithic builders website. Contributions from popular writers, such as Hancock, Bauval and Schoch are included(ah).
A rational explanation for the construction of cyclopean masonry has been offered by Professor of Architecture Jean-Pierre Protzen and demonstrated on a YouTube clip(f).
(q) https://davidpratt.info/easter1.htm (section 10)