Caves · South Wales
Siambri Ddu
Siambri Ddu is a cave in the United Kingdom.
Nick Chipchase — CC BY-SA 2.0 via Wikimedia Commons licence
Plan your visit
- Typical visit
- 45 min–1.5 h
- Nearest railway station
- Whistle Inn halt · 2.6 km
- Free entry
- Dog-friendly
About
Siambri Ddu is a named cave entrance in South Wales. Free to visit. The site is a designated Site of Special Scientific Interest. It sits within the Monmouthshire parliamentary constituency. The nearest railway station is Whistle Inn halt, about 2.6 km away. Postcode area NP4.
Photo gallery
Protected designations
- Site of Special Scientific Interest: River Wye SSSI
Designations sourced from Natural England open data under OGL v3.
Place summary
Siambri Ddu is a cave located in South Wales, within the parish of Llanfoist Fawr, postcode NP4. It is designated as a Site of Special Scientific Interest (SSSI) due to its significance in the River Wye SSSI.
AI-generated from the structured facts on this page (operator, designation, listing, era). Not a substitute for visiting.
- Coordinates
- 51.7973, -3.0879
- District
- Monmouthshire
- Parish
- Llanfoist Fawr
- Postcode
- NP4 9SS
- Parliamentary constituency
- Monmouthshire
- Nearest railway station
- Whistle Inn halt — 2.6 km
Sources
- osm: n336683906 (ODbL)
Other places nearby
Pwll Du Limestone Quarry & Water Balance Lift
Quarries · 0.0 km
Pwll-Du Bunkhouse
Hostels · 0.5 km
Pwll Du
Vineyards · 0.5 km
Ogof Draenen
Caves · 0.5 km
Remains - Garnddyrys Forge
Historic houses · 0.7 km
Pen-ffordd-goch Pond
Reservoirs & lochs · 0.8 km
Pen-rhiw-Ifor
Mountains & hills · 0.9 km
Blaen Pig
Mountains & hills · 0.9 km
Blaen Pig quarries
Quarries · 1.1 km
Carreg Maen Taro
Windmills · 1.3 km
Gilwern Hill
Mountains & hills · 1.3 km
Gilwern Hill, Monmouthshire
Natural landmarks · 1.4 km
Nearby
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Pwll Du Limestone Quarry & Water Balance Lift
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📷 5📷 5Vineyards · South Wales
Pwll Du
Pwll Du — a UK vineyard in wales south, producing English or Welsh wine from cool-climate grape varieties.
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Ogof Draenen
Ogof Draenen is a cave in the United Kingdom.
📷 3Historic houses · South Wales
Remains - Garnddyrys Forge
Remains - Garnddyrys Forge — a historic house in wales-south, United Kingdom.
📷 3Reservoirs & lochs · South Wales
Pen-ffordd-goch Pond
Pen-ffordd-goch Pond — pond in Monmouthshire, Wales, UK.
Where to eat & stay near Siambri Ddu
Places to stay
📷 5
📷 5Campsites · South Wales
Pyscodlyn Camping and Caravan Site
Pyscodlyn Camping and Caravan Site — a campsite in wales south.
📷 5Caravan parks · South Wales
Pyscodlyn Camping and Caravan Site
Pyscodlyn Camping and Caravan Site — a caravan park in wales south.
📷 5
📷 7Hotels · South Wales
Kings Arms Hotel
Kings Arms Hotel — a hotel in wales south.
📷 5Places to eat & drink
📷 7
📷 7
Restaurants · South Wales
The Walnut Tree
The Walnut Tree — a restaurant in wales south.
Restaurants · South Wales
Little Crown
Little Crown — a restaurant in wales south.
📷 5Historic pubs · South Wales
Skirrid Mountain Inn
Skirrid Mountain Inn — Historic pub — listed building or notable heritage status.
📷 5Restaurants · South Wales
Sultan of Wales
Sultan of Wales — a restaurant in wales south.
More caves in this region
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Agen Allwedd (Ogof Gam)
Agen Allwedd (Ogof Gam) is a cave in the United Kingdom.
📷 3
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📷 3Frequently asked questions
- Where is Siambri Ddu?
- Siambri Ddu is in South Wales, United Kingdom (postcode NP4 9SS), in the parish of Llanfoist Fawr.
- What is Siambri Ddu?
- Siambri Ddu is a cave in the United Kingdom.
- How do I get to Siambri Ddu?
- The nearest railway station is Whistle Inn halt, about 2.6 km away. Drivers can use postcode NP4 9SS.
- Is Siambri Ddu a protected site?
- Yes — Siambri Ddu is part of the River Wye SSSI Site of Special Scientific Interest.
- Is Siambri Ddu free to visit?
- Yes, Siambri Ddu is free to enter.
- How do I get to Siambri Ddu?
- The nearest railway station is Whistle Inn halt, about 2.6 km away. Drivers can navigate to postcode NP4 9SS.