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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Partially excavated places tagged “plains”

3 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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Verified4 Widely accepted1 Contested0 Hypothetical0 Unverified0 Pseudoarchaeology0

3 places

Geoglyphs

Partially excavated

🇺🇸 United States · Megalith

Bighorn Medicine Wheel

Late Prehistoric 1200–1700 CE · Plains Indians

24 m medicine wheel 28 spokes, solstice alignments.

✓VerifiedUNESCO

🇨🇦 Canada · Archaeological wonder

Head-Smashed-In Buffalo Jump

Archaic to Protohistoric 3600 BCE–1850 CE (use from 5700 years BP) · Plains Indigenous (Blackfoot / Niitsitapi – Peigan, Kainai, Siksika; earlier Besant, Avonlea)

UNESCO World Heritage buffalo jump (1981) used continuously 5,700 years: 300 m cliff with 10 m drop onto bone bed 11 m deep of bison skeletons, drive lanes marked by 240 cairns stretching 20 km to…

✓Verified

🇺🇸 United States · Rock art

Legend Rock Petroglyphs Wyoming

Dinwoody (8000 BCE–1000 CE) to En-Toto Pecked to historic · Plains Archaic Dinwoody / Shoshone

Thermopolis Legend Rock state park, Dinwoody style intermontane archaic unique to Wyoming.