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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Verified world heritage places tagged “observatory”

2 places to sift through. Narrow by kind, country, period or how firmly each one is established — contested and pseudoarchaeological claims are labelled here, never hidden.

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Verified5 Widely accepted0 Contested0 Hypothetical0 Unverified0 Pseudoarchaeology0

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Astronomical villages1

first maya excavation1

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✓VerifiedUNESCO

🇺🇸 United States · Earthwork

Newark Earthworks

Hopewell culture 100 BCE–500 CE · Hopewell (Adena descended, Algonquian? cohort)

Hopewell giant geometric enclosures marking 18.6-yr lunar cycle.

✓VerifiedUNESCO

🇬🇹 Guatemala · Pyramid

Uaxactún Group E Observatory (E-Group)

Middle Preclassic to Late Classic (1000 BCE–900 CE; E-Group 600–300 BCE) · Maya (Preclassic then Tikal sphere)

Type-site of Mesoamerican E-Group solar observatory: western radial pyramid E-VII (Late Preclassic 500 BCE) aligning via three eastern platforms to sunrise solstices/equinoxes, deliberate horizon…