Southwestern Iberia has one of Europe’s largest concentrations of megalithic monuments, but the claimed Europe-wide total of 35,000 dolmens is not established. Antequera’s Menga, Viera and Tholos date mainly to the 3rd millennium BCE, after Britain had become an island; nor are they established as the world’s oldest. The region’s caves contain Palaeolithic occupation, ornaments and rock art. The Younger Dryas lasted about 1,200 years. The video interprets some images as ships and argues that survivors of a Younger Dryas coastal catastrophe carried seafaring and engineering knowledge into megalithic society. That survivor explanation is the video’s hypothesis, not an established archaeological finding, and the images alone do not prove industrial-scale fishing.
Southwestern Iberia’s dolmens and caves: the video’s Younger Dryas survivor link is theory

Site mentioned
📍 Southwestern Iberia megalithic sites
Key facts
- Southwestern Iberia has one of Europe’s largest concentrations of megalithic monuments, but a verified tally of 35,000 dolmens in Europe, most of them in the region, is not established.
- The UNESCO-listed Antequera Dolmens—Menga, Viera and Tholos—date mainly to the 3rd millennium BCE and are not established as the world's oldest.
- The English Channel had formed before these dolmens were built; England was already separated from mainland Europe, so the pre-Channel claim is incorrect.
- Iberian caves contain Palaeolithic occupation, ornaments and rock art. The cited results do not verify the post's combined 14,000-, 18,000- and 35,000-year sequence or a Younger Dryas date for ship paintings.
- The Younger Dryas lasted about 1,200 years, conventionally from 12,900 to 11,700 years ago.
- The video interprets some rock images as ships and argues that Younger Dryas survivors carried seafaring and engineering knowledge into megalithic society. That is the presenter's hypothesis, not an established archaeological finding, and the images alone do not demonstrate industrial-scale fishing.
Sources
Alentejo - Demographicsdatacommons.org
Baixo Alentejo, 1.72, 2022. 2. Alentejo Litoral, 1.66, 2022. 3. Lezíria do Tejo, 1.52, 2022. 4. Alto Alentejo, 1.46, 2022. 5. Alentejo Central, 1.45, 2022.
Explore Alto Alentejo, Portugalmadaboutportugal.com
More than one hundred dolmens, antas and menhirs defy the ravages of time and remain standing. The Parque Megalítico dos Coureleiros (Coureleiros Megalithic ...
Alentejowikitravel.org
A beautiful, mostly agricultural region, remarkable for its wide horizons, filled with soft hills that change color along the year.
The Most Densely Populated Cities in Europeworldatlas.com
Paris is the most densely populated city in Europe with a population density of approximately 54,415 persons per square miles. The French ...
List of European Union cities proper by population densityen.wikipedia.org
The population, population density, and land area for the cities of the European Union listed below are based on the entire city proper,
Prehistoric Iberiaen.wikipedia.org
The rock art found at over 700 sites along the eastern side of Iberia is the most advanced and widespread surviving from this period, certainly in Europe, and ...
The Dolmen of Menga and the Tholos of Monteliriofundacionpalarq.com
Landscape, Memory and Social Complexity in the Great Megaliths of Iberia: The Dolmen of Menga and the Tholos of Montelirio · LOCATION · RESULTS · PICTURES.
Genetic prehistory of Iberia differs from central and ...popular-archaeology.com
The team analyzed human remains of 13 individuals from the north and south of Spain, including the rich archaeological site of El Portalón, ...
Was this story useful?
Keep exploring
Every site on this page sits on the globe, and the people who research them are on the Discord.
3D Globe · Sites by country · Story Archive · Research Library · Weekly Journal · Search
AI-generated text · images from the original sources · always verify with the sources.