If is the smallest island in the Frioul archipelago situated in the Mediterranean Sea about a mile offshore in the Bay of Marseille in southeastern France where Le Château d’If, a fortress and later a prison, is located.
Prison Island Swims
If is site of one of the 8 open water swims of the Octad of Open Water Swims or Prison Island Swims that includes the following open water swims around formerly well-guarded isolated prison islands. Robben Island, Alcatraz Island, Spike Island and Rottnest Island are now 21st century sites better known for challenging open water swims with tricky currents and surrounding marine life. Convicts of the past have given way to contemporary open water swimming traditionalists and wetsuit-clad triathletes and swimmers.
- Le Château d’If (France), a fortress and former prison) located on the island of If in the Mediterranean Sea in southeastern France
- Fort Boyard (France), an oval-shaped fort and military prison located between the Île-d'Aix and the Île d'Oléron in the Pertuis d'Antioche on the west coast of France
- Devil's Island (French Guiana), is 14 km (9 miles) off the coast of French Guiana in South America and a well-known location of the French penal system and a leper colony
- Île de Gorée (Senegal), known as the location of the House of Slaves located off the coast of Senegal
- Robben Island, the former isolated prison home of Nelson Mandella and other South Africans 7.5 kilometers off the coast of Cape Town, South Africa.
- Alcatraz Island, the former isolated prison home of Al Capone and other celebrated American criminals 1.5 miles from Aquatic Park in San Francisco Bay in California, U.S.A.
- Spike Island (Irish: Inis Píc), the former isolated prison home of infamous immates 2 kilometers off the coast in Cobh Harbour, Ireland
- Rottnest Island, the finish of a 19.7 km Rottnest Channel Swim west of Perth, Western Australia was used as an Aboriginal prison between 1838 and 1931 for Aboriginal men and boys