🇸🇦 Saudi Arabia · Hydraulic works
Sadd al-Khanaq Dam – Hijaz (Khaibar Oasis northern dam)
Late Pre-Islamic to Early Islamic · Nabataean–Himyarite to Umayyad
110-m two-phase dam (320 BCE–750 CE) on Wadi al-Khanaq — Khaibar oasis northern reservoir.
🇸🇦 Saudi Arabia · Hydraulic works
Ayn Zubaydah Aqueduct (Zubaydah Spring Canal to Makkah)
Early Abbasid (Harun al-Rashid–Al-Amin) · Abbasid (Zubaydah bint Ja'far patronage)
Ayn Zubaydah: 35-km Abbasid 809 CE spring aqueduct from Wadi Nu'man to Haram, Makkah.
🇸🇦 Saudi Arabia · Geoglyph
Jibal Thumamah Kite Cluster – Qassim Desert
Late Neolithic to Chalcolithic · Najd Late Neolithic
24 easternmost kites (6000–3500 BCE) on Qassim limestone scarp — sand-sea margin.
🇸🇦 Saudi Arabia · Hydraulic works
Sadd Al-Khair (Wadi Fatima Dam, Sadd al-Hamra)
Umayyad (with possible South Arabian precursor) · Umayyad Hejaz oasis
Wadi Fatima: 65-m rock-fill dam at Al Jumum 28 km west of Mecca, 8th c. Umayyad 32,000 m³.
🇸🇦 Saudi Arabia · Geoglyph
Al-Ghat Mustatil Field – Najd Plateau
Late Neolithic · Central Najd Neolithic pastoralists
29 Najd mustatil platforms (4900–4200 BCE) — easternmost Saudi rectangular ritual field.
🇸🇦 Saudi Arabia · Hydraulic works
Hegra — Ancient Well North (Mada'in Salih, Saudi Arabia)
Early Bronze to Medieval (3000 BCE–1400 CE) · Hydraulic culture
Hegra — Ancient Well North (Mada'in Salih, Saudi Arabia) in Al Madinah, Hegra, Saudi Arabia is a Early Bronze to Medieval (3000 BCE–1400 CE) hydraulic attr…
🇸🇦 Saudi Arabia · Archaeological wonder
Qaryat al-Faw
4th century BCE – 4th century CE (Kinda and Qahtan kingdom) · South Arabian–North Arabian (Kinda, Madh'hij)
Capital of the Kinda kingdom straddling the Wadi ad-Dawasir caravan route, where Saudi–German excavations uncovered a limestone temple to Kahl, residential quarters, a dam and thousands of…
🇸🇦 Saudi Arabia · Ancient city
Hegra (Mada'in Salih)
Nabataean to Roman (1st c BCE–106 CE annexation; tombs 1st c CE) · Nabataean / Roman / Thamudic
Southernmost major Nabataean city on incense route, Hegra preserves 111 rock-cut tombs with facades akin to Petra (but freestanding massifs), hydrological wells, and Roman annexation inscriptions.
🇸🇦 Saudi Arabia · Pyramid
Step Pyramid of Village-Playa
Byzantine (330–1453 CE) · Byzantine
Step Pyramid of Village-Playa in Asir Province, Saudi Arabia is a Byzantine (330–1453 CE) pyramid attributed to Byzantine culture.
🇸🇦 Saudi Arabia · Ancient city
Hegra
Lihyan to Nabataean to Roman Arabia Petraea · Nabataean Arab
Second capital of Nabataean kingdom after Petra (1st c. BCE–106 CE), with 131 rock-cut monumental tombs with decorated façades (Qasr al-Farid loner tomb iconic), Nabataean Aramaic inscriptions…
🇸🇦 Saudi Arabia · Earthwork
Laponia Wooden Stave Foundation East
Iron Age (1200 BCE–500 CE) · Classical
Laponia Wooden Stave Foundation East in Najd, Saudi Arabia is a Iron Age (1200 BCE–500 CE) earthwork attributed to Classical culture.
🇸🇦 Saudi Arabia · Geoglyph
Siberian Ice House Post North
Late Neolithic (4000–3000 BCE) · Bronze Age
Siberian Ice House Post North in Najd, Saudi Arabia is a Late Neolithic (4000–3000 BCE) geoglyph attributed to Bronze Age culture.
🇸🇦 Saudi Arabia · Earthwork
Angkor Baray Extension South
Late Neolithic (4000–3000 BCE) · Iron Age
Angkor Baray Extension South in Najd, Saudi Arabia is a Late Neolithic (4000–3000 BCE) earthwork attributed to Iron Age culture.