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Anti-invasion Defences 630m E of Cae'r-tyddyn is a post-medieval anti-tank obstacle situated in Wales. The structure represents the defensive preparations undertaken during the twentieth century, when the threat of invasion prompted the construction of barriers across vulnerable landscape. Built upon bedrock of Ordovician mafic tuff, the site occupies terrain shaped by ancient volcanic activity that has given the surrounding countryside its distinctive character.
Anti-tank obstacles of this type typically consisted of concrete or metal barriers, sited to impede vehicular movement and protect strategic locations. Their positioning reflects careful consideration of local topography and accessibility. The mafic volcanic geology beneath this monument provides a foundation of considerable density, which would have offered stable ground for construction of these substantial defences.
The monument is protected by Cadw, the Welsh Historic Monuments service, under reference ME250. Such defences form an important part of the archaeological and military heritage of twentieth-century Wales, documenting a specific historical period when rural landscapes across Britain were adapted for home defence. The site preserves evidence of civilian and military preparedness during a critical era.
Anti-invasion Defences 630m E of Cae'r-tyddyn is a scheduled monument protected by Cadw under reference ME250. View the official record →
Anti-invasion Defences 630m E of Cae'r-tyddyn is a post-medieval anti-tank obstacle situated in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference ME250.
Anti-invasion Defences 630m E of Cae'r-tyddyn dates from the post medieval/modern period, and is classified as a anti-tank obstacle. It is one of over 32,000 scheduled monuments protected across the UK.
Anti-invasion Defences 630m E of Cae'r-tyddyn is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is ME250.
Several scheduled monuments lie within 10 km, including Nant Helygog ring cairn (1.4 km), Brithdir Roman Fort (2.8 km), Maes Coch Hut Circles (5.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Anti-invasion Defences 630m E of Cae'r-tyddyn's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Anti-invasion Defences 630m E of Cae'r-tyddyn stands on Unnamed Extrusive Rocks, Ordovician, bedrock that formed in the Ordovician. The rock here is mafic tuff.