🇺🇦 Ukraine · Ancient city
Bilsk Hillfort – Gelonus
Early Iron Age, Scythian period · Scythian-agrarian (Budini, possibly Geloni Greeks per Herodotus)
4,400-ha 7th-c. BCE Scythian mega-hillfort—largest in Europe, Herodotus's wooden Gelonus candidate.
🇮🇪 Ireland · Earthwork
Dún Aonghasa
Late Bronze Age to Early Medieval (c.1100 BCE–800 CE) · Atlantic Iron Age / Early Medieval Gaelic
Cliff-edge triple stone fort on Inishmore (6 ha) with massive chevaux-de-frise of jagged limestone — Ireland's most dramatic hillfort.