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9. 1914: Ulster Volunteers, the Ulster Unionist paramilitary force, on parade at a remote setting in the Northern Ireland countryside. (Photo by Central Press/Getty Images)
1914: Ulster Volunteers, the Ulster Unionist paramilitary force, on parade at a remote setting in the Northern Ireland countryside. (Photo by Central Press/Getty Images) Photo: Central Press

10. 3rd April 1939: A temporary rope bridge connects the tiny island of Carrick-a-Rede with the northern coast of County Antrim during the salmon fishing season. (Photo by Fox Photos/Getty Images)
3rd April 1939: A temporary rope bridge connects the tiny island of Carrick-a-Rede with the northern coast of County Antrim during the salmon fishing season. (Photo by Fox Photos/Getty Images) Photo: Fox Photos

11. circa 1900: Volcanic rock formations at the Giant's Causeway in County Antrim. (Photo by London Stereoscopic Company/Hulton Archive/Getty Images)
circa 1900: Volcanic rock formations at the Giant's Causeway in County Antrim. (Photo by London Stereoscopic Company/Hulton Archive/Getty Images) Photo: London Stereoscopic Company

12. August 1963: Two boys fishing at the harbour at Bangor in County Down. (Photo by D. Peacock/Fox Photos/Getty Images)
August 1963: Two boys fishing at the harbour at Bangor in County Down. (Photo by D. Peacock/Fox Photos/Getty Images) Photo: D. Peacock

