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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Saudi Arabia

36 places in the atlas, 7 of them inscribed as UNESCO World Heritage.

Kinds found here

Archaeological wonders27
Geoglyphs20
Earthworks19
Hydraulic works7
Ancient cities4
Dams3
Megaliths3
Necropoleis3
Rock art sites3
Aqueducts2
Buried cities1
Canals1

How well established

Verified33
Accepted3

Top regions

Al Madinah Region1
Al-Jawf Province, Sakakah-Dumat al-Jandal oasis1
Al-Jawf Province, Wadi Sirhan depression (525 m floor)1
Al-Jouf Province1
Al-Madinah Region, Wadi al-Khanaq, Khaibar oasis north1

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Verified33 Widely accepted3 Contested0

AlUla & Ha'il, Nefud margins

AlUla, Medina Province1

Ha'il Region, Jubbah–Umm Sanman basin, 90 km NW of Ha'il city, Al-Thula piedmont1

Hail Province, Nafud al-Kabir fringe1

Hail Region1

Hail Region, Shuwaymis1

Jizan Province / Asir Province, Tihama littoral plain, Harrat al-Birk fringe, Red Sea coastal terrace1

Hypothetical0

Unverified0

Pseudoarchaeology0

Heritage

UNESCO World Heritage only

Excavation

Partially excavated28 Excavation ongoing7 Unexcavated1

1 place

Dams UNESCO World Heritage Clear all

✓VerifiedUNESCO

🇸🇦 Saudi Arabia · Hydraulic works

Wadi Hanifah Dams (Diriyah Dam System)

Najdi Emirate to First Saudi State · Najdi oasis (Diriyah Amirship)

Wadi Hanifah: 6 Najdi 15th-18th c. wadi dams at Diriyah UNESCO site, Riyadh 24.73N 46.57E.