Castle designs through history 
Photographs and brief descriptions of the evolution of castles from earthworks to modern fantasy pastiches.
https://www.exploring-castles.com/castle_designs/

Norman Castles 
Part 1, illustrated with photographs and diagrams, describes what they are and how they came about:
https://englandexplore.com/norman-castles-part-1-what-they-are-how-they-came-about/?utm_source=mailerlite&utm_medium=email&omhide=true
Part 2 describes some of the earliest and best examples of Norman castles in England:
https://englandexplore.com/norman-castles-part-2-some-of-the-earliest-best-castles-in-england/

Motte and Bailey Castles
Photographs and brief descriptions of several castles in England and Wales, plus a modern European reconstruction of an early motte and bailey design.
https://englandexplore.com/motte-and-bailey-castles/?utm_source=ActiveCampaign&utm_medium=email&omhide=true

Castles of the Welsh princes
Photographs and brief descriptions of five castles built by Welsh princes: Dolbadarn, Dolforwyn, Castell-y-Bere, Criccieth and Carreg Cennen.
https://englandexplore.com/castles-welsh-princes/?utm_source=mailerlite&utm_medium=email&omhide=true

Edward I’s ‘ring of iron’ castles
Photos, brief descriptions and a map of the following castles built at the instigation of King Edward I as part of his campaign to annex Wales, and listed in the order in which the construction of each began: Flint (1277), Hawarden (1277), Rhuddlan (1277), Builth (1277), Aberystwyth (1277), Denbigh (1283), Caernarfon (1283), Conwy (1283), Harlech (1283), Beaumaris (1295).
https://englandexplore.com/edward-i-ring-of-iron-castles/?utm_source=ActiveCampaign&utm_medium=email&omhide=true&utm_campaign=Britcastlesposts#google_vignette

The Castles of Tudor History
Ludlow Castle, Hever Castle, Carew Castle, Pembroke Castle, and Leeds Castle all played key roles during the reigns of the Tudor dynasty.
https://englandexplore.com/castles-tudor-history/?utm_source=mailerlite&utm_medium=email&omhide=true

Castles of the Lune Valley
Map, photos and information.
https://bitaboutbritain.com/the-castles-of-the-lune-valley/

Britain’s most unusual castles
Photographs and descriptions of Pineapple Castle, Eltham Castle, Castle Drogo, Wimpole’s Folly, and Kelburn Castle.
https://englandexplore.com/britains-most-unusual-castles/?utm_source=mailerlite&omhide=true

Does a cave beneath Pembroke Castle hold the key to the fate of early Britons?
https://www.theguardian.com/science/article/2024/jun/22/does-a-cave-beneath-pembroke-castle-hold-key-to-fate-of-early-britons