The remains of the Castle can be visited
Flint Castle

Flint Castle is a castle ruin in the Welsh town of Flint. Its construction in the late 13th century marked the beginning of a comprehensive fortification strategy by King Edward I of England in Wales. The complex has an unusual design of its keep.
History+
Construction of Flint Castle commenced around the year 1277 under King Edward I of England. This measure was part of the king's broader plan to secure his rule in Wales through the construction of strategically important fortifications. The castle also holds literary significance, serving as the setting for Act 3, Scene 3, in William Shakespeare’s drama “Richard II.”
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 53.2518, -3.1300