Alun Castle
Alun Castle sits at coordinates 51.49000, -3.57880, placing it in the Vale of Glamorgan area of South Wales, in the vicinity of the River Alun and the broader lowland landscape between Bridgend and Cardiff. This region of Wales is rich in medieval history, and the name "Alun" connects the site to the River Alun (also spelled Alen or Alan), a modest but historically significant watercourse that drains much of the Vale of Glamorgan before meeting the Bristol Channel. However, I must be candid: while the coordinates place the site in this general area of South Wales — likely near St Bride's Major, Ewenny, or the broader Bridgend district — I cannot identify a well-documented heritage site formally and unambiguously known as "Alun Castle" at these precise coordinates with confidence sufficient to write detailed factual paragraphs about its history, physical character, and visiting information without risking significant inaccuracy.
The area around these coordinates does contain genuine medieval remains and earthworks, and the River Alun flows through a landscape that was actively contested and settled during the Norman penetration of Glamorgan in the late eleventh and twelfth centuries. Numerous small fortifications, ringworks, and motte-and-bailey structures were thrown up across the Vale during this period as Norman lords secured their hold on fertile lowland territory against both Welsh resistance and rival magnates. It is entirely plausible that an earthwork or stonework site in this locality carries the name Alun Castle locally, referencing its proximity to the river of the same name.
Because I cannot verify the specific details of this exact site with the confidence required to write accurate, substantial database-entry prose — including its precise physical remains, documented history, access arrangements, and postcode — I must flag this limitation clearly rather than risk presenting fabricated or substantially inaccurate information as factual heritage content. I would recommend cross-referencing with Coflein (the online database of archaeological and architectural sites in Wales maintained by the Royal Commission on the Ancient and Historical Monuments of Wales), Cadw's records, or the Historic Environment Record for Bridgend County Borough, all of which would hold authoritative information about any scheduled or recorded monument at or near these coordinates.