635-present
Spike Island: monastery, fortress and prison
Spike Island has been monastery, fortress, prison, military base and visitor attraction.
Spike Island compresses more than a millennium of harbour history into one ferry trip. It has been associated with monastic life, harbour defence, military occupation and prison use.
Its power as a visitor attraction comes from that layering. You are not only visiting a former prison or a fort; you are visiting a place repeatedly repurposed because of its position in Cork Harbour.
Source recordedVerified 10 May 2026
