A boat-access-only island in Cork Harbour, reachable only by ferry from Kennedy Pier, Cobh, or as a paid heritage-site visit — there is no bridge and no free public access. In just over a hundred acres, Spike Island carries a 7th-century monastic foundation, one of the largest star-shaped forts in the world, a 19th-century convict depot that grew into what was, for a few years, probably the biggest prison in the British Empire (the roots of its "Ireland's Alcatraz" nickname), a War of Independence internment camp, a place in Cork Harbour's wider Treaty Port defences alongside Fort Meagher and Fort Davis, and a 20th-century Army post and prison that only closed in 2004. Since 2010 it has reopened as an award-winning heritage attraction. Ferry crossing is roughly 15 minutes each way; book with the island's own operator before travelling, as sailings are weather-dependent. Looking for things to do in Cork Harbour (Spike Island)? Start here — no car, no ticket, no booking.
Opens the free interactive app — point your phone at each stop and hear it speak, in 12 languages.
Stops on This Trail
Fort Mitchel (Fort Westmorland)
St Mochuda's Monastery, Spike Island
Spike Island Convict Depot
The Garrison & Convict Graveyard
A Soldier's Family on Spike Island: Ellen "Nellie" Organ
War of Independence Internment Camp
Spike Island and Cork Harbour's Triple Defence
Fort Mitchel Prison: 1985 Riot and 2004 Closure
Spike Island Today: Ireland's Alcatraz Reborn
For Schools
This trail is also available as a free printable classroom worksheet or full trail booklet — no site visit required. See how Classroom Prep Mode works →