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An atlas of Earth’s mysterious places — megaliths, pyramids, lost and sunken cities — with the evidence shown plainly: what is verified, what is contested, and what is still unknown.

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Tagsold-stone-fort

#old stone fort

1 place carries this tag, across every kind and continent it appears in.

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Verified1 Widely accepted0 Contested0 Hypothetical0 Unverified0 Pseudoarchaeology0

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Earthworks1 Megaliths1

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🇺🇸United States1

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✓Verified

🇺🇸 United States · Earthwork

Old Stone Fort

Middle Woodland 80–550 CE · Middle Woodland (Hopewell-related)

2.75 km stone-walled hilltop enclosure, solstice-aligned, 80–550 CE.