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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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CountriesPT

Portugal

71 places in the atlas, 9 of them inscribed as UNESCO World Heritage.

Kinds found here

Megaliths45
Antas14
Dolmens10
Ancient cities6
Contested sites6
Cromleches6
Stone circles6
Hypothetical places5
Castros4
Necropoleis4
Archaeological wonders3
Fortified settlements3

How well established

Verified61
Accepted2
Contested2
Hypothetical3
Pseudo3

Top regions

Alentejo10
Alentejo, Evora10
Alentejo, Évora4
Alentejo, Évora District3
Lisbon District, Torres Vedras2
Alentejo, Monsaraz, Telheiro1

Filters

Verification

Pick several

Verified61 Widely accepted2

Alentejo, Mora, Pavia, central Alentejo plaza, Pavial village

1

Alentejo, Moura, Xarez village, Alqueva Reservoir fringe, near confluence Guadiana1

Alentejo, Portalegre, near Castelo de Vide, Meada village plain southwest of Castelo de Vide1

Alentejo, Reguengos de Monsaraz, Monte da Toca plateau1

Alentejo, Évora District (Monsaraz, Reguengos de Monsaraz)1

Alentejo, Évora District (Reguengos de Monsaraz)1

Contested

2

Pseudoarchaeology3

Category

Megaliths45 Antas14 Dolmens10 Ancient cities6 Contested sites6 Cromleches6 Stone circles6 Hypothetical places5 Castros4 Necropoleis4 Archaeological wonders3 Fortified settlements3 Menhirs3 Rock art sites3

All categories →

Heritage

UNESCO World Heritage only

Excavation

Excavated36 Partially excavated17 Not applicable8 Excavation ongoing7 Unexcavated3

Tags

megalithic41 alentejo25 iberian neolithic10 chalcolithic6 anta4 castro4 cromlech4 phantom4 alcalar3 algarve3 late neolithic atlantic3 neolithic3 pizzigano3 portugal3 antillia2 beira2 bell beaker2 columbus2

3 places

Verified Unexcavated Clear all

🇵🇹 Portugal · Tumulus

Baraka Burial Mound

Chalcolithic (4500–3300 BCE) · Chalcolithic

Baraka Burial Mound in Alentejo, Portugal is a Chalcolithic (4500–3300 BCE) tumulus attributed to Chalcolithic culture.

✓VerifiedUNESCO

🇵🇹 Portugal · Cave

Pen Rig Mere Grotto

Andean Formative (1800–200 BCE) · Andean Formative

Pen Rig Mere Grotto in Alentejo, Portugal is a Andean Formative (1800–200 BCE) cave attributed to Andean Formative culture.

🇵🇹 Portugal · Megalith

Antela da Herdade da Candieira — Redondo Cromlech Door Frame

Neolithic (4200 BCE) Redondo Candieira rectangular cromlech 15 × 12 m door-framed 4 m · Redondo Neolithic Candieira cluster 4200

Candieira door cromlech.