Downpatrick

Tradition holds that all three patron saints of Ireland (Patrick, Brigid and Colmcille) lie together on the hill beside the cathedral, under a granite slab laid there in 1900. John de Courcy took the town in 1177 and made it the capital of his private Norman earldom of Ulster.

• Struell Wells · Four holy wells in a rocky glen outside Downpatrick, with separate stone bath houses for men and women. A chapel is recorded here in 1306; hundreds came on Midsummer Eve and the Friday before Lammas. Nothing standing is older than about 1600.
• Nendrum Monastery · Three concentric drystone enclosures, a round tower stump, and a sundial from around 900. Beside them, dug out of the shore, the oldest excavated tide mill anywhere in the world — tree-ring dated to 619, rebuilt in 787.
• Slieve Donard — the guardian in the mountain · Patrick is said to have blessed Donard in the womb and told him he would not die, but would keep watch inside this mountain for ever. On the summit sits the highest passage tomb in Britain or Ireland, built around 3300 BC by people who left no name at all.

All of these are pinned on the Hidden Ireland map.