9,700 years and counting
Mountsandel
In the 1970s the archaeologist Peter Woodman excavated a wooded bluff a mile south of the Diamond and found post-holes from circular huts, microlith flint tools, salmon and eel bones, and hazelnut shells in fire pits. Carbon dated between 7,900 and 7,600 BC — the oldest known human settlement in Ireland. The hunters who lived here picked the spot for the same reason everyone else has since: a wide tidal river, a salmon run, woodland for shelter. You walk up through the trees today and there is nothing built. That is correct. They didn't build anything that lasted, and the absence is the point.
Older than most of the world
The Honourable The Irish Society
Founded by Royal Charter in 1613 as a consortium of London livery companies tasked with planting Coleraine and the new county of Londonderry. They built the original walls, ran the salmon traps at the Cutts, and shipped fish back to London markets. Four centuries later they are still in business, still hold the fishing rights on the Lower Bann, and still operate from an office in Coleraine. Day licences for the river are sold from there. The Society has outlasted the empire that created it.
A 1690s thatched cottage that stayed put
Hezlett House
Five miles up the Castlerock road sits a low whitewashed cottage with a cruck-frame timber skeleton dating to around 1690 — one of the oldest vernacular houses in Northern Ireland. Probably built as a parsonage, sold to a Presbyterian farmer named Isaac Hezlett in 1761, lived in by Hezletts until the National Trust took it on in 1976. The roof is thatch on cruck trusses you don't expect to see this far north. Open seasonally; check the National Trust calendar. Quiet, low-ceilinged, the real thing.
Public roads, 200 mph
The Triangle
Once a year in early May the public roads between Coleraine, Portstewart and Portrush close, and the North West 200 motorcycle road race takes over the 8.97-mile triangle circuit. First run in 1929. The biggest annual sporting event in Northern Ireland — 150,000 spectators down hedgerows, riders within inches of dry-stone walls, lap times under five minutes. The rest of the year you can drive the same roads at sensible speeds and try to picture it. You can't really.