Ruabon/Llantysilio Mountains and Minera is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Buckley Claypits and Commons is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales. It is an important reserve for the great crested newt.
Caeau Pen-y-coed is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Caerwys Tufa is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Cefn Meadow is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Chwarel Pant Glas is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Chwarel Singret is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Coed y Gopa is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Crest Mawr Wood is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Graig Fawr is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales, now in Denbighshire. It is 153 metres high and located near Prestatyn. It is owned by the National Trust.
Graig Quarry is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Graig, Llanarmon-yn-Ial is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Hanmer Mere is a body of water and Site of Special Scientific Interest in the preserved county of Clwyd, north Wales, now in Wrexham county borough.
Hendre Bach is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Hendre, Llangedwyn is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Llay Bog is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Llwyn is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Maes y Grug is a Site of Special Scientific Interest at Alltami in the preserved county of Clwyd, north Wales.
Nant-y-Belan and Prynela Woods is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.
Stryt Las a'r Hafod is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales.