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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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© 2026 Mysteria. Exploring the ancient world.Map © OpenFreeMap · OpenMapTiles · OpenStreetMap contributors

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Tagsoctagon

#octagon

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

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Verification

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Verified1 Widely accepted0 Contested0 Hypothetical0 Unverified0 Pseudoarchaeology0

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Ancient cities1 Temple complexes1 Tombs1

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🇹🇷Turkey1

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UNESCO World Heritage only

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1 place

✓VerifiedUNESCO

🇹🇷 Turkey · Temple complex

Ephesus Arsinoeion-Octagon — Sanctuary Terrace of Arsinoe

Hellenistic to Roman (288 BCE – 262 CE) · Ptolemaic to Roman Ephesian

Curetes terrace with 36 m Arsinoeion rotunda and Octagon princess tomb.