Gateholm or Gateholm Island is a small tidal island off the south west coast of Pembrokeshire, in the community of Marloes and St Brides, in the south west side of Wales, in the west of the UK, and about 8 miles (13 km) west of the port of Milford Haven. It is known for its Romano-British remains. Gateholm is owned by the National Trust as part of their Marloes Sands and Mere estate.
Allt Pontfaen - Coed Gelli-fawr is a Site of Special Scientific Interest in Pembrokeshire, South Wales which starts at Allt Pontfaen and finishes at Coed Gelli-fawr. It has been designated as a Site of Special Scientific Interest since January 1954 in an attempt to protect its fragile biological elements. The site has an area of 73.12 hectares and is managed by Natural Resources Wales.
Carn Ingli is a Site of Special Scientific Interest (SSSI) in the Preseli Hills, Pembrokeshire, Wales. It was designated a SSSI in January 1954 in an attempt to protect its fragile biological elements. The site has an area of 428.4 hectares and is managed by Natural Resources Wales.
Castlemartin Corse is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since February 1985 in an attempt to protect its fragile biological elements. The site has an area of 30.4 hectares and is managed by Natural Resources Wales.
Corsydd Llangloffan is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since February 1992 in an attempt to protect its fragile biological elements. The site has an area of 56.7 hectares and is managed by Natural Resources Wales.
Dowrog Common is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1954 in an attempt to protect its fragile biological elements. The site has an area of 0.18 hectares and is managed by The Wildlife Trust of South & West Wales.
Dyffryn Gwaun is a Site of Special Scientific Interest (SSSI) in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1954 in an attempt to protect its fragile biological elements. The site has an area of 25.36 hectares and is managed by Natural Resources Wales.
Esgyrn Bottom is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1957 in an attempt to protect its fragile biological and geological elements. The site has an area of 49.9 hectares and is managed by Natural Resources Wales.
Felin Llwyngwair is a Site of Special Scientific Interest near Newport in Pembrokeshire, South Wales. It was designated a SSSI in October 2000 to protect its fragile biological elements. The site has an area of 0.01 hectares and is managed by Natural Resources Wales.
Gallt Llanerch - Coed Gelli-deg is a Site of Special Scientific Interest in the Gwaun Valley, Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1954 in an attempt to protect its fragile biological elements. The site has an area of 30.47 hectares and is managed by Natural Resources Wales.
Hook Wood is a Site of Special Scientific Interest in Pembrokeshire, South Wales. In 1603 George Owen described Hook Wood as one of “the best standing woods” of Pembrokeshire. It has been designated as a Site of Special Scientific Interest since January 1986 in an attempt to protect its fragile biological elements. The site has an area of 12.02 hectares and is managed by Natural Resources Wales. SSSIs in Wales have been notified of a total of 142 different animal species and 191 different plant species.
Jeffreyston Pastures is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1996 in an attempt to protect its fragile biological elements. The site has an area of 15.72 hectares and is managed by Natural Resources Wales.
Minwear Wood is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1968 in an attempt to protect its fragile biological elements including ancient woodland of sessile oak with hazel and downy birch on the upper part of the Milford Haven estuary. The wood is structurally diverse and has scarce plants and epiphytic lichens. The site has an area of 13.69 hectares and is managed by Natural Resources Wales.
Newport Cliffs is a Site of Special Scientific Interest lying a little to the north of Newport in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1954 in an attempt to protect its fragile biological elements. The site has an area of 48.23 hectares and is managed by Natural Resources Wales.
Park House Outbuildings, Stackpole is a Site of Special Scientific Interest in Pembrokeshire, South Wales, 4 kilometres (2.5 mi) south of Pembroke, and is of special interest as the largest known nursery roosts of lesser horseshoe bats Rhinolophus hipposideros in Pembrokeshire. It has been designated as a Site of Special Scientific Interest since February 1998 in an attempt to protect its fragile biological elements. The site has an area of 0.01 hectares and is managed by Natural Resources Wales.
Portheiddy Moor is a Site of Special Scientific Interest a little to the east of Abereiddy in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since July 1987 in an attempt to protect its fragile biological elements: a "diverse example of grazed fen-meadow with springs, swamp and tall fen amongst extensive flushed communities". The site has an area of 9.5 hectares and is managed by Natural Resources Wales.
Strumble Head - Llechdafad Cliffs is a Site of Special Scientific Interest (SSSI) in Pembrokeshire, South Wales. It has been designated as a SSSI since January 1954 in an attempt to protect its fragile biological and geological elements.
Trefeiddan Moor is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since January 1966 in an attempt to protect its fragile biological elements. The site has an area of 21.61 hectares and is managed by Natural Resources Wales.
Waun Fawr, Puncheston is a Site of Special Scientific Interest in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since March 1995 in an attempt to protect its fragile biological elements. The site has an area of 8.26 hectares.
Wyndrush Pastures is a Site of Special Scientific Interest south-east of the village of Redberth, just south of the A477, and around five km (3.1 mi) to the north-west of the coastal town of Tenby in Pembrokeshire, South Wales. It has been designated as a Site of Special Scientific Interest since October 1999 in an attempt to protect its fragile biological elements. The site has an area of 45.5 hectares and is managed by Natural Resources Wales.
