List of tunnels in the United Kingdom
Northern Ireland
Columns: County | Tunnel | Type | Length (Imperial) | Date of opening
Londonderry | Castlerock | Rail | 668 yd | 1845 - 1853 | Londonderry | Downhill | Rail | 307 yd | 1845 - 1846 | Armagh | Lissummon | Rail | 1759 yd | early 1860s | Down | Binnian Tunnel | Aqueduct | 2.5 miles | 1948 - 1952 | Antrim | Whitehead | Rail | 145 yd | 1862 - 1994 | Tyrone | Dungannon | Rail | 800 yd | 1862