Portarlington

Settled by French Huguenots after 1691, who were given land here and left their names, their street plan and two churches behind them. The Barrow runs through the middle, which puts half the town in Laois and half in Offaly.

• Dún Ailinne · The royal site of Leinster: a 13-hectare hilltop enclosure whose vast timber circles were built for ceremonies, then dismantled and burned.
• Rock of Dunamase · A fortress on a rock over the midland plain, sacked by Vikings out of Dublin in 845. Diarmait Mac Murchada is said to have given it with his daughter Aoife to Strongbow in 1170 — a dowry that helped bring the Normans in. Cromwell’s men blew it up in 1650.
• Hill of Allen — Fionn's fort · Almu, the white fortress of Fionn mac Cumhaill and the Fianna. A 19th-century folly now crowns the hill; the quarry has eaten half of it.

All of these are pinned on the Hidden Ireland map.