Knockdrum Stone Fort - Credit: Wikimedia Commons
Knockdrum Stone Fort is a circular stone rath, ringfort, or hilltop fort near Castletownshend in County Cork, Ireland. It was restored before 1860, and there were archaeological excavations from 1930–31. The three-metre thick walls are reported as either 2 metres or 1.75 metres high depending on the source, and as 29 metres in diameter.Ancient Ireland retrieved 26 September 2015Megalithic Ireland retrieved 26 September 2015 The site is owned by the Irish Government which has declared it a national monument.archaeology.ie retrieved 26 September 2015 Read more on Wikipedia
Source: en.wikipedia.org