Photo of Caernarfon Castle, a ruined castle near Newborough, Gwynedd, north Wales.

Caernarfon CastlePhoto Reinaldo Sture / Unsplash

Castles & strongholds in GwyneddGwynedd, Wales

8 castles in the Albion Guide across Gwynedd — see the full castles directory, or everything to explore in Gwynedd.

Photo of Caernarfon Castle, a ruined castle near Newborough, Gwynedd, north Wales.

Caernarfon Castle

Castle near Newborough

Edward I's mightiest polygonal-towered fortress.

Photo of Harlech Castle, a ruined castle in Eryri, Gwynedd, north Wales.

Harlech Castle

Castle near Harlech

Edward I's castle on a crag above Cardigan Bay.

Photo of Penrhyn Castle, a castle near Bangor, Gwynedd, north Wales.

Penrhyn Castle

Castle near Bangor

Vast neo-Norman fantasy castle by the sea.

Photo of Castell Dolbadarn, a ruined castle near Llanberis, Gwynedd, north Wales.

Castell Dolbadarn

Castle near Llanberis

A round-towered Welsh castle above Llanberis.

Photo of Criccieth Castle, a ruined castle in Gwynedd, north Wales.

Criccieth Castle

Castle near Criccieth

Twin-towered Welsh castle on a coastal knoll.

Castell Cricieth

Castle near Criccieth

A medieval castle in Gwynedd.

Castell y Bere

Castle near Llwyngwril

A medieval castle in Gwynedd.

Castell Carn Dochan

Castle near Bala

A medieval castle in Gwynedd.