Cross in Monknewtown

Explorer Tom This Mill in Monknewtown is proud of its red brick chimneystack more than it is of actually grinding grain. It dominates the landscape like it owns the place, which is very cheeky for a mill. Bring your worst joke, the plant loves them.

Explorer Tom Townleyhall passage tomb hosted a terrible love story where the couple argued about whose turn it was to carry the heavy stuff. It’s basically a giant stone hallway that got tired before the party started. Tell the kids it's a castle. Close enough.

Explorer Tom Dowth Castle in Dowth has been sitting on that ridge since 1234, looking smug about it. Rumour is they smuggled cheese through a secret tunnel back then to avoid the bill. Stop the car, it’s worth the hazard lights.

Explorer Tom Passage tomb in Knowth made a New Year's resolution to stop losing kerbstones, but failed miserably again this year. It’s sitting right next to the big mound, looking slightly embarrassed about its missing bits. Go back in winter, it's a different animal.

Explorer Tom You see one mound? Give Knowth another minute to complicate your day. Knowth looks like one enormous grassy mound in the Boyne Valley until its stonework starts giving away the plot. The main monument, built around 3200 BC, holds two separate passages, one entering from the east and one from the west. Around its base stood 127 kerbstones, and excavators found more than 200 carved stones, including art hidden on faces that visitors would not normally have seen. If I could read every carved line, I would still let the builders keep a few secrets. That is quite a private gallery for a place already making a public impression. Centuries later people built a royal residence on top, using the old mound for a new kind of authority. Knowth is part of the Brú na Bóinne heritage complex, and visits are managed through the visitor arrangements there; check current booking and access before going. Study the carved spirals, but leave the ancient builders at least one secret they can keep.

Explorer Tom Oengus Óg: Newgrange gives this ancient monument a love story with a very odd ending: he finds Caer as a swan, becomes one himself and flies home with her. I was ready for a romantic walk; Oengus went straight for wings. Fair play to him.

Explorer Tom European ash in County Louth was once a matchmaker who worked under its branches, pairing off locals with questionable taste. Bring wellies and low expectations, leave delighted by the absolute chaos of romance it orchestrated here.

Explorer Tom European Yew in Meath brags about surviving a storm that flattened everything else nearby, acting like it was barely a hiccup. It’s got major survivor's guilt but pretends to be totally unbothered by it all. Tell the kids it's a castle. Close enough.