The ruins of a circular tower on the eastern edge of Dolforwyn Castle in Powys, Wales.
From <a href="http://en.wikipedia.org/wiki/Dolforwyn_Castle" rel="nofollow">Wikipedia</a>:
Dolforwyn castle is a castle situated within the Welsh county of Powys (Ordnance Survey Landranger map : series No 136) some 4 miles from Montgomery close to the village of Abermule. Positioned on a wooded ridge overlooking the Severn Valley the site commands excellent views in all directions except east.
Dolforwyn Castle is a fine example of the type of castle built by the Welsh princes as opposed to those built by the English within Wales.
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This is an HDR image made up from seven exposures (-3 to +3) processed in Photomatix.