United Kingdom
Castell y Bere is a Welsh castle built by Llewellyn the Great in around 1221. It was besieged by the English in 1283 then later abandoned. It is a fabulous ruin with remains of towers, walls and a barbican. It is like walking back in time when you walk up the path to the castle entrance. The views from the towers are peaceful green hillsides that rise to heights above the castle. It is easily accessible, completely free and often deserted.
Take the Llanegryn turn off the A493 and follow the road to near the end of the valley, Castell y Bere signposted. Entrance free
castlewales.com/cybere.html
Google map: tinyurl.com/2uv7c7d
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