Reconstruction of a Taíno village in Cuba.

The Exceptional Cuban Underwater City: Prehistoric Ramifications of its Origins – Part II

(Read the article on one page)

Submerged over 700 meters (2300 feet) underwater, the submerged Cuban city is thought to have been built originally built at a higher altitude and subsequently sunk to its present depth through tectonic activity—but this hypothesis has not stood up to the scrutiny of the experts. How can the existence of this underwater city at this great depth be reconciled with the well-established consensus that the sea level never dropped so low?

(Read Part I here)

At first glance, this seems to be impossible, for the deepest straits that connect the Caribbean Sea to the Atlantic Ocean are far deeper than 120 meters (395 feet); for instance, the Yucatan Channel, Windward Passage, and the Anegada Passage separating the Yucatan Peninsula from Cuba, Cuba from Hispaniola, and the Virgin Islands from Anguilla have maximum depths of 2800, 1700, and 1915 meters respectively (9186, 5577, 6282 feet); moreover, many of the straits and passages separating the isles of the Lesser Antilles are deeper than 120 meters. Given the fact that the sea level only fell to 120 meters below sea level, as has been previously mentioned, during the entire Pleistocene epoch, let alone during the interval within which Homo sapiens has walked this earth, it seems like an impossibility for the Caribbean Basin to have been isolated, as these straits would have been, even during the maximum drawdown of the seas, still been 2680, 1580, and 1795 meters below sea level.

Map of the Caribbean Sea and Basin

Map of the Caribbean Sea and Basin ( Public Domain )

An aerial view of Montserrat, in the Caribbean. Representational image.

An aerial view of Montserrat, in the Caribbean. Representational image. (Flickr/ CC BY-SA 2.0 )

According to the proposition we have established, this would have meant that the Caribbean Basin could not have been isolated from the Atlantic Ocean, as not all parts of the West Indies landmass would have been above sea level—a necessary condition for the Caribbean Basin to have been dry. In spite of this seemingly overwhelming evidence that the Caribbean Basin could not have been isolated from the Atlantic Ocean even during the depths of the Atlantic Ocean, I maintain that it is still possible; I shall present a scenario in which this is so.

Great Landmass Collapse  

Imagine, contrary to the discussion above, that the Caribbean Basin was indeed isolated from the Atlantic Ocean, with the West Indies archipelago being a contiguous landmass entirely above the minimum sea level that was reached during the Pleistocene epoch, namely 120 meters (395 feet) below the present day sea level. This would require the Yucatan Channel, Windward Passage, Anegada Passage, and the many straits separating the Lesser Antilles islands to  all have maximum depths lying above 120 meters below the present sea level. Before inquiring as to how this could possibly be, let me finish my line of reasoning.

Aerial view of land in Puerto Rico, in the Caribbean.

Aerial view of land in Puerto Rico, in the Caribbean. (Flicker/ CC BY-SA 2.0 )

In this scenario where the Caribbean Basin was isolated, it would have necessarily been dry, as has been established earlier. Now, imagine that some phenomenon, such as an earthquake, or erosion, caused multiple parts of this contiguous landmass to collapse below the sea level. What would be the consequences of such an event? At each point where the collapses occurred, water from the Atlantic Ocean would begin to pour through into the basin through these collapsed points; moreover, the force of the flowing water would carve these collapsed points to ever deeper depths, in turn causing even greater volumes of water to flow through, which would then erode these collapsed points into ever deeper channels, and so on, until finally, the Caribbean Basin was filled to the same level as the Atlantic Ocean, whereupon the inflow would cease. In other words, once the collapse occurred, it would cause a flow of water that would, though beginning as a trickle, would inevitably become a raging torrent that could not be checked by any force, whether human or divine.

What would be the "sill depths" (the maximum depth at which there is horizontal communication between a marginal sea basin and its adjacent ocean) of these channels after the Caribbean Basin was completely filled to its brim? Some, through which only a small amount of water flowed, would not be very deep, whereas others, through which a great deal of water flowed, would be much deeper. Although a precise calculation must entail considering variables such as the erosivity of the material at a particular point where the channels were carved, it seems entirely plausible that the deepest of the channels so carved might end up with sill depths exceeding thousands of meters. Here we have a scenario in which the existence of channels with sill depths greater than the maximum level to which the sea dropped during the glacial period, such as the Yucatan Channel and Anegada Passage, can nevertheless be reconciled with an isolated and hence dry Caribbean Basin during that same epoch.


What a great proposal. Lets also remember the proposal of a meteor forming the Gulf of Mexico. If this event occurred during an ice age, that might explain the sudden rise in sea levels too rather than tectonics shifts. I am certain much of human history lies below the oceans. It only makes sense. Bravo Mr. Yoon.

This theory should be easy to check: The seafloor sediments should carry a record of continuous submersion, or a long period of dryness followed by flooding. They can check micro-fossils to determine ocean temps over thousands of years, so it should be easy to determine whether an ocean was even there at all. The article stops short of doing a simple fact check, but nice original thinking...

I agree with Ken. It's possible that our geological timelines are askew and many geologic events have happened closer to our time than believed by conventional science. See the articles on the Great Salt Lake for example.

The idea for this article is well thought out and the author has a theory to help explain a possibility of a sunken city off of Cuba. Providing the data is sound and accurate, the question becomes when do researchers NOT possessed of personal bias attempt to validate or disprove the data. Questioning the length of time that has passed has nothing to do with what may be possible. Researchers and Scientists can push our understandings of our past to new heights when an open mind is present and can accept conflicting ideas that help to look at areas of history from a different perspective. Isolated groups of thought that do not accept new ideas is our undoing because in the end, there is reality and the interpretation of that reality. Great article.

If the city were there pre end of last ice age, then when the ice dam broke and the melt water lake on the N.A. glacial ice suddenly released, there could have been a tsunami that breached the low connecting lands. Or there could have been a mega-tsunami caused by some other thing, such as a Canary island volcano collapse or an underwater earthquake, that could have washed over the lower lands and started the flow and subsequent erosion. It would be very interesting to find out if what they found on sonar really is a ruined city. The water in that area is very treacherous. Wouldn't there be ruins elsewhere too, hopefully at higher elevation?


Register to become part of our active community, get updates, receive a monthly newsletter, and enjoy the benefits and rewards of our member point system OR just post your comment below as a Guest.

Human Origins

Sky Burial: Tibet’s Ancient Tradition for Honoring the Dead
The tradition of Sky burials, which is also known by the name of ‘Celestial burial’, is particularly associated with the Tibetan culture, although it has existed in other civilizations throughout history.

Ancient Technology


The ancient and mysterious Sphinx, Giza, Egypt.
In 1995, NBC televised a prime-time documentary hosted by actor Charlton Heston and directed by Bill Cote, called Mystery of the Sphinx. The program centered on the research and writings of John Anthony West, a (non-academic) Egyptologist, who, along with Dr. Robert Schoch, a professor of Geology at Boston University, made an astounding discovery on the Great Sphinx of Giza in Egypt.

Our Mission

At Ancient Origins, we believe that one of the most important fields of knowledge we can pursue as human beings is our beginnings. And while some people may seem content with the story as it stands, our view is that there exists countless mysteries, scientific anomalies and surprising artifacts that have yet to be discovered and explained.

The goal of Ancient Origins is to highlight recent archaeological discoveries, peer-reviewed academic research and evidence, as well as offering alternative viewpoints and explanations of science, archaeology, mythology, religion and history around the globe.

We’re the only Pop Archaeology site combining scientific research with out-of-the-box perspectives.

By bringing together top experts and authors, this archaeology website explores lost civilizations, examines sacred writings, tours ancient places, investigates ancient discoveries and questions mysterious happenings. Our open community is dedicated to digging into the origins of our species on planet earth, and question wherever the discoveries might take us. We seek to retell the story of our beginnings. 

Ancient Image Galleries

View from the Castle Gate (Burgtor). (Public Domain)
Door surrounded by roots of Tetrameles nudiflora in the Khmer temple of Ta Phrom, Angkor temple complex, located today in Cambodia. (CC BY-SA 3.0)
Cable car in the Xihai (West Sea) Grand Canyon (CC BY-SA 4.0)
Next article