Since 1611
Four centuries of ferry
James I granted land on both sides of the Narrows to Peirce Tumolton in 1611 with the obligation to maintain a ferry. The crossing has run, in some shape, ever since. In 1835 the local Portaferry and Strangford Steamboat Company built the Lady of the Lake — Ireland's first steam ferry. The current vessels, MV Portaferry II (2001) and MV Strangford II (2017), do the eight-minute crossing every half hour, 364 days a year. Closed Christmas Day. That's the only day in four hundred years it hasn't gone.
The world-first tidal turbine
SeaGen
From 2008 to 2016 the Narrows hosted SeaGen — twin 16-metre rotors on a column rising out of the water like a piece of unfinished bridge. It was the world's first commercial-scale tidal stream generator and the first tidal turbine anywhere in the Northern Hemisphere to feed the national grid. 1.2 megawatts for up to 20 hours a day. Decommissioned in stages between 2016 and 2019. The locals remember the silhouette.
Savage country
Portaferry Castle
The little tower-house at the harbour was built in the 16th century by William Le Savage. The Savages had held the southern Ards Peninsula since the Anglo-Norman push of the 1170s, and this castle was theirs through the wars and back. In 1635, Sir James Montgomery of Rosemount repaired the roof and floors so his sister — Patrick Savage's wife — could live in it in comfort. State Care Historic Monument now. Free to walk up to. Locked, mostly, but the silhouette is the point.
The first Presbyterians
Templecranny
The ruined church up Church Street is the site of the earliest Presbyterian congregation in Ireland. John Drysdale preached here in the 1640s. The Anglican church took the building over in 1662 and held it until they built the new parish church across the road in the 1780s, at which point Templecranny was dismantled. The graveyard remains. Bishop Robert Echlin (d. 1635) is buried in the ruins. So is James Maxwell, who died for the United Irishmen in the 1798 Rebellion.
Why the divers come
The marine lab
Queen's University Belfast put its Marine Laboratory in Portaferry because the Narrows are the most-studied tidal channel in the British Isles. Over 2,000 marine species in the lough. Currents to 8 knots. The lab still runs from the shore here and the diving world treats it as a research-grade dive site. The Narrows are not a swim. They are a fast-moving piece of working ocean, and the people who know them well respect them.