🇬🇧 United Kingdom · Earthwork
Fiskerton Causeway
Iron Age, Early to Middle La Tene 456-395 BCE · Iron Age La Tene Lincolnshire
456/395 BCE Iron Age timber causeway (175 m) at Fiskerton, Witham Valley with 11 votive swords and logboats.
🇦🇷 Argentina · Hypothetical site
Sierra de las Quijadas — Potrero Central Aguada Causeway (Potrero de la Aguada Centre)
Hypothetical pre-Hispanic to Historic · Hypothetical Huarpe / Historic Hualtaran pastoral
Hypothetical central causeway on Potrero de la Aguada floor — 800 m pavement amid historic corrals.
🇧🇴 Bolivia · Ancient city
Llanos de Mojos — Cedro Forest Island and Western Lagoon at Casarabe Central (Moxos Oeste)
Late Pre-Columbian (500 – 1400 CE) · Casarabe (Llanos de Moxos)
Casarabe Cedro West forest island 12 m high 300 m with causeway 800 m to lagoon 200 m and field ridges 2 km; Llanos de Moxos hydraulic.
🇧🇴 Bolivia · Ancient city
Llanos de Mojos — Cedro Forest Island and Western Lagoon at Casarabe Central (Moxos Oeste) — v2
Late Pre-Columbian (500 – 1400 CE) · Casarabe (Llanos de Moxos)
Casarabe Cedro West forest island 12 m high 300 m with causeway 800 m to lagoon 200 m and field ridges 2 km; Llanos de Moxos hydraulic.
🇧🇴 Bolivia · Earthwork
Llanos de Mojos — Cotoca Northern Causeway (Beni Causeway North, Mojos)
Casarabe (500–1400 CE) · Casarabe
Northern causeway of Cotoca in Mojos — 1.4 km ×10 m causeway with canals to forest island.
🇬🇧 United Kingdom · Ancient village
Flag Fen Southern Extension & Mustdyke Timber Causeway (Fengate, Peterborough)
Late Bronze Age (Ewart Park, 1300–900 BCE) · Fenland Late Bronze (Deverel–Rimbury, 1300–900 BCE)
380-m southern Flag Fen causeway extension (1220–1120 BCE) — double-post drove way to Whittlesey.
🇧🇴 Bolivia · Earthwork
Llanos de Mojos — Casarabe Forest Island Laguna Central East (Moxos East)
Casarabe (500–1400 CE) · Casarabe
Eastern forest island laguna of Casarabe in Mojos — 12 m mound on 18 ha island and 800 m causeway.
🇧🇷 Brazil · Ancient village
Kuhikugu — Western Plaza Cluster K9 at Seki Lake (Xingu West)
Late Pre-Columbian (900 – 1650 CE) · Xinguano Arawak / Kuhikugu
Western Kuhikugu plaza K9 250×150 m at Seki Lake west — causeway 500 m ×12 m and reservoir 100 m under gallery forest; Xinguano.
🇧🇷 Brazil · Ancient village
Kuhikugu — Western Plaza Cluster K9 at Seki Lake (Xingu West) — v2
Late Pre-Columbian (900 – 1650 CE) · Xinguano Arawak / Kuhikugu
Western Kuhikugu plaza K9 250×150 m at Seki Lake west — causeway 500 m ×12 m and reservoir 100 m under gallery forest; Xinguano.
🇧🇴 Bolivia · Earthwork
Llanos de Moxos – Casarabe Culture Monuments
Late Intermediate, Casarabe culture · Casarabe (Moxos) savanna farmers
1,000 km of causeways + 147 forest-island cities (500–1400 CE) in seasonally flooded Beni savanna.
🇧🇴 Bolivia · Lost city
Llanos de Mojos — Casarabe Eastern Forest Island (Laguna San José)
Middle Horizon to Late Intermediate (c.500 – 1400 CE) · Casarabe culture
Casarabe eastern forest island at Laguna San José — polygonal ditch, 6 m platform and 1 km causeway under forest, 500–1400 CE.
🇧🇷 Brazil · Lost city
Kuhikugu — Eastern Cluster K8 Seki Settlement (Upper Xingu)
Late Pre-Columbian (c.700 – 1600 CE) · Xinguano tradition (Kuikuro ancestors)
Upper Xingu plaza town 8 km east of classic Kuhikugu — ring ditch, 700 m causeway and terra preta, 14 ha, 900–1350 CE.
🇺🇸 United States · Earthwork
Marietta Earthworks
Middle Woodland Hopewell (100 BCE–500 CE) · Hopewell (Marietta phase)
Hopewell ceremonial complex (100 BCE–500 CE) at confluence of Muskingum and Ohio Rivers, originally three enclosures: Capitolium Square (150×110 m terraced platform and graded way), Quadranaou double…
🇬🇧 United Kingdom · Earthwork
Flag Fen Bronze Age Causeway
Bronze Age to Iron Age (~1500–300 BCE; causeway 1350–1150 BCE) · British Bronze Age (Deverel-Rimbury to Post-Deverel-Rimbury)
A 1-km line of 60,000 oak posts forming a causeway and platform across Flag Fen where Francis Pryor excavated systematic votive deposits: over 300 metalwork items deliberately broken (swords bent,…
🇬🇧 United Kingdom · Archaeological wonder
Sweet Track
Early Neolithic (~3807 BCE) · British Early Neolithic
The oldest engineered timber trackway in northern Europe, a 1.8-km raised walkway of oak planks pegged to transverse ash rails, dendro-dated to construction in the winter–spring of 3807 BCE.