A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of Man. SSSI/ASSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in the United Kingdom are based upon them, including national nature reserves, Ramsar sites, Special Protection Areas, and Special Areas of Conservation. The acronym "SSSI" is often pronounced "triple-S I".
The River Cleddau consists of the Eastern and Western Cleddau rivers in Pembrokeshire, west Wales. They unite to form the Daugleddau estuary and the important harbour of Milford Haven.
Allt Penycoed Stream Section is a Site of Special Scientific Interest in Carmarthenshire, Wales. It is protected by law and has been designated as an SSSI since April 1985 in an attempt to protect rare or unique features or species within it. The site has an area of 1.62 hectares and is managed by Natural Resources Wales.
Many parts of Wales are protected areas, according to a number of designations. They include three national parks, and five Areas of Outstanding Natural Beauty.
Beddmanarch–Cymyran is a site of special scientific interest (SSSI) on the Welsh island of Anglesey extending to just over 900 hectares, and centred on the Cymyran Strait. It was first notified in 1961 for its coastal botanical and ornithological interest. The site is also a marine protected area as it includes intertidal areas and contains marine components.
Arfordir Abereiddi 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 2002 in an attempt to protect its fragile biological and geological elements. The site has an area of 63.74 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 100.86 hectares and is managed by The Wildlife Trust of South & West Wales.
Dwrhyd Pit 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 geological elements. The site has an area of 0.18 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.
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.
Stackpole Quay - Trewent Point is a cliff on the Castlemartin Peninsula of South Pembrokeshire South Wales and is a Site of Special Scientific Interest (SSSI). It has been designated as a SSSI since January 1977 in an attempt to protect its fragile biological and geological elements. The site has an area of 64.15 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.
Treffgarne Bridge Quarry 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 geological elements. The site has an area of 0.4 hectares and is managed by Natural Resources Wales. The name derives from the Welsh "Trefgarn".
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 and is managed by Natural Resources Wales.
Fferam Uchaf is a Site of Special Scientific Interest in Anglesey, North Wales, for its exposures of Llanvirn (Ordovician) rocks. It has been designated as a Site of Special Scientific Interest since October 2001 in an attempt to protect its fragile Geological elements. The site has an area of 1.05 hectares and is managed by Natural Resources Wales and is situated 1.5 km north-east of Llanddeusant.
Glannau Penmon - Biwmares is a Site of Special Scientific Interest in Anglesey, North 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 170.87 hectares and is managed by Natural Resources Wales.
Henborth is a Site of Special Scientific Interest in Anglesey, North Wales. It has been designated as a Site of Special Scientific Interest since October 1989 in an attempt to protect its fragile geological elements. The site has an area of 10.96 hectares and is managed by Natural Resources Wales.
Llanbadrig - Dinas Gynfor is a Site of Special Scientific Interest in Anglesey, North Wales. It has been designated as a Site of Special Scientific Interest since January 1957 in an attempt to protect its fragile geological elements. The site has an area of 26.49 hectares and is managed by Natural Resources Wales.
