Spike Island
A star fort in Cork Harbour that held more prisoners than any jail in the world in 1850, and was a prison again until 2004.
Updated 19 October 2026
Spike Island has been a monastery, a fort, a prison, a Victorian convict depot and an army base. Fort Mitchel, the bastioned star fort covering much of it, was begun in 1804 against a French invasion. From 1847 it was used as a convict depot for the Famine years and after, and by 1850 it held around 2,300 prisoners - at that point more than any prison in the world - in conditions where over a thousand died and are buried on the island; more than a thousand more were transported from here to Australia. The British held it as a Treaty Port until 1938. It became a prison again in 1985, saw a riot and fire in 1985, and closed in 2004. The tour covers the fort, the punishment block, the graveyard and the prison wings, and includes a guided introduction with free time after. Ferries run seasonally from Cobh and cancel in poor conditions.
History
The island, of 103 acres, was first the site of a monastic settlement, and its position in the harbour meant it was used at times for defence and as a prison; it is dominated by a bastion fort now named Fort Mitchel, and since the early 21st century it has been developed as a heritage attraction with €5.5 million of investment (Wikipedia, Spike Island, County Cork).
What you'll find
- Fort Mitchel - the bastioned star fort begun in 1804.
- The convict depot - where 2,300 were held in 1850, and the burial ground.
- The modern prison wings - the buildings in use until 2004.
- The harbour setting - Cork Harbour and Cobh across the water.
When to go
April to October; ferry service is seasonal and reduced outside summer. Booking is essential - sailings are limited and fill. Allow half a day including the crossing.
Things to know
Access only by the timed ferry, which cancels in poor weather and must be booked. A lot of outdoor walking on a large exposed site. The history is grim - a thousand deaths and mass transportation - and is told plainly.
Nearby
Cobh and Saint Colman's Cathedral are across the water; Cork city is up the river.
Key facts
Source: Wikidata, item Q3777131, read on 18 October 2026.
What to pack for Spike Island
Chosen from what this place is for. Tap a kit for the full checklist.
- Comfortable walking shoes - Sightseeing means kilometres of pavement and cobbles daily. Find on Amazon
- Modest clothing - Shoulders and knees covered - the single most common requirement. Find on Amazon
- A slim anti-theft daypack - Zips that close properly; keep it in front in crowds and on transit. Find on Amazon
- A scarf or shawl - To cover the head or shoulders on entry; women especially at mosques. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

