Doon Hill, Extinct volcano in Bunowen More, County Galway, Ireland.
Doon Hill is an extinct volcano on the Errismore peninsula that rises about 63 meters above sea level. The volcanic plug sits near Bunowen Harbour in western Ireland and forms a distinctive landmark in the coastal landscape.
Around 1806, military authorities built a signal tower at the summit to monitor coastal activities. During World War II, a concrete watch post was later added, showing how this location served defensive purposes across two centuries.
The name comes from Irish and means hill of the fort, reflecting its role as a defensive position. Local people have long recognized this spot as an important coastal landmark.
The hill is easy to spot from the coast and serves as a navigation point for fishermen approaching Bunowen Pier. The area is relatively accessible, though reaching the summit depends on local conditions.
The site contains remains from two different eras of coastal defense that coexist side by side, reflecting how its strategic importance shifted over time. These layers of history tell the story of different threats Ireland faced across the decades.
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