🇩🇪 Germany · Megalith
Goseck Circle
Early Neolithic · Stichbandkeramik / Stroke-Ornamented ware
4900 BCE circular ditch and double timber palisade with solstice gates — Europe's oldest solar observatory.
🇩🇪 Germany · Megalith
Pömmelte Ring Sanctuary
Late Neolithic to Early Bronze Age · Bell Beaker → Únětice / Early Bronze Age
115 m Bell Beaker/Early Bronze Age ring sanctuary with seven concentric timber-ditch circles and ritual pits, c.2300 BCE.
🇬🇧 United Kingdom · Earthwork
Durrington Walls and Woodhenge
Late Neolithic · Grooved Ware / Wessex
Massive Neolithic henge enclosure (c. 2600 BCE), 500 m diameter, largest in Britain, with southern timber circle and dense Late Neolithic settlement (1000+ pits, houses).
🇺🇸 United States · Earthwork
Monks Mound
Mississippian 900–1200 CE (peak 1050–1200) · Mississippian (Cahokia)
Largest earthen structure in the Americas north of Mexico and centerpiece of Cahokia Mounds State Historic Site.
🇺🇸 United States · Earthwork
Stubbs Earthworks
Middle Woodland Hopewell (100 BCE–200 CE) · Hopewell (Little Miami)
Massive Hopewell enclosure at confluence of Turtle and Little Miami Rivers, 700 m long irregular rectangular enclosure (12 ha) with 1.5 m embankments and deep 2 m exterior ditch, featuring timber…
🇬🇧 United Kingdom · Megalith
Woodhenge & Durrington Walls
Late Neolithic · Grooved Ware
Timber-circle henge (Woodhenge, 6 rings, 168 posts) and Durrington Walls super-henge (500 m diameter, 17 ha, 2 entrances, largest henge in Britain) – contemporary settlement of Stonehenge builders…
🇺🇸 United States · Buried city
Cahokia Mounds
Emergent Mississippian to Stirling phase · Mississippian (Illinoian)
Largest Mississippian centre (650–1400 CE) with 120 mounds including Monks Mound (30 m, 1000x700 ft base, largest earthen platform north of Mexico).
🇺🇸 United States · Earthwork
Moorehead Circle at Fort Ancient
Middle Woodland Hopewell (c.100 BCE–250 CE) with Fort Ancient reuse · Hopewell → Fort Ancient
Outer-embankment timber circle 60 m diameter discovered 2007 by magnetometry inside Fort Ancient Hilltop Enclosure (Hopewell 100 BCE–500 CE, later Fort Ancient reuse).