The Submerged Pyramids Of Rock Lake, Wisconsin

The Submerged Pyramids Of Rock Lake, Wisconsin


Since the early 1830s, when the first pioneers arrived in the southern section of Wisconsin, between what is now Milwaukee and Madison, the indigenous Winnebago or Ho Chunk people had spoken about a “sunken hamlet of rock tepees” beneath Rock Lake.

The Submerged Pyramids Of Rock Lake, Wisconsin


Their narrative was rejected as Indian legend until two duck hunters peeked over the side of their boat during a water-clearing drought at the start of the twentieth century.

They were confronted by a large pyramidal structure that sat darkly and enormously in the depths of Rock Lake. Since then, deteriorating subsurface visibility has masked the buried building in dispute, aided by pollution.

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Wisconsin’s Rock Lake map

Dr. Fayette Morgan, a local dentist and early civilian pilot in Wisconsin, saw Rock Lake for the first time from an altitude vantage point on April 11, 1936. He spotted the black shapes of two rectangular structures on the bottom of the lake near its center from the open cockpit of his lanky biplane circling at 500 feet.

He made numerous passes and immediately saw their consistent proportions and monstrous size, which he judged to be above 100 feet apiece. Dr. Morgan hurried home for his camera after landing to refuel, then flew off immediately to catch the submerged items on film. By the time he returned across the lake in the late afternoon light, the lake’s submerged monuments were disappeared.

Subsequent and repeated attempts to photograph or even rediscover them from the air failed until 1940, when they were discovered again by a local pilot, Armand Vandre, and his rear cockpit observer, Elmer Wollin.

However, as their single-engine airplane banked over the lake’s south end at less than a thousand feet, they were taken aback by a completely new sight. Under fewer than twenty feet of water, a colossal, perfectly centered triangle structure pointed directly north lay beneath them. A pair of black circles were next to one another towards the peak.

At least eight buildings lie beneath the surface of Rock Lake. Skin divers and sonar have mapped and photographed two of them.

The Limnatis Pyramid, as Structure No. 1 is known, has a base width of 60 feet, a length of around 100 feet, and a height of approximately 18 feet, but only about 10 feet emerge from the silt and muck. It is a truncated pyramid constructed almost entirely of spherical, black stones. The stones are squarish on the truncated top. It is possible to distinguish the remnants of a plaster covering.


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Vandre and Wollin projected that each of the delta’s equal sides would be 300 feet long. To the northeast of the triangle was a small, narrow sunken island, perhaps 1,500 feet long and 400 feet wide. More startling was the discovery of a straight line running under water from the southeastern shore to the top of the drowned delta.

When Frank Joseph reported the discovery with local geologist Lloyd Hornbostel, he thought the line was the remnants of a large stone canal that connected Rock Lake to Aztalan, three miles distant.

Aztalan is presently a 21-acre archaeological park surrounded by a stockaded wall that partially encloses two clay temple mounds known as the Sun and Moon Pyramids. The ceremonial center was twice the size at its heyday in the late 13th century. At the time, it consisted of three circular walls flanked by watchtowers that encircled a triad of pyramidal earthworks topped by wooden shrines.

Aztalan belonged to the Upper Mississippian Culture in its last stage, commencing approximately 1100 A.D., and thrived throughout the American Midwest and South, although carbon dating experiments indicated its oldest known beginnings in the third century B.C.

It had a maximum population of around 20,000 individuals who resided on both sides of the walls. They were headed by astronomer-priests who positioned their pyramids exactly for the purpose of computing many astronomical events, such as the winter solstice, moon phases, and Venus locations.

Around 1320 A.D., the Aztalaners set fire to their city, abandoning it to the flames. They escaped to the south, according to surviving Winnebago oral tradition. Their exodus, interestingly, paralleled the abrupt development of the Aztec state in the Valley of Mexico.

“The finding of underwater buildings there may be a precursor to a far larger one to come, when we finally turn our attention to the sea and search its depths for the lost fountainhead of terrestrial civilization—Atlantis.

Rock Lake is noteworthy for its submerged stone structures—pyramidal burial mounds of men who worked in Michigan’s Upper Peninsula’s copper mines between 3000 and 1200 B.C. According to Frank Joseph, the mines were undoubtedly dug and controlled by engineers from Atlantis, and so at least some of the underwater tombs include the bones of Atlantean laborers.

Sources: Atlantis Rising Magazine Vol. 25: “Rock Lake Unveils Its Secret – Fly over Makes New Underwater Discoveries” by Frank Joseph; The Atlantis Encyclopedia by Frank Joseph


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