Fairy fort or earthen ringfort in Dungummin Upper

Explorer Tom Castle in Castlecor started as a bet between two lads in the pub about who could build the biggest dirt pile. They won, then forgot to mention it had trees growing out of it. Tell the kids it's a castle. Close enough.

Explorer Tom Ballinacree Bridge, Moat, Raheever, Sranayalloge, County Cavan: Eighteenth-century rubble stone spanning the border. It complains about modern traffic to the council daily. I bet it’s seen more gossip than your auntie. Wave hello politely.

Explorer Tom Lisnabrin House is all classic symmetry and sash windows, looking very serious near Mountnugent. It probably charges entry just to look at it. Go on, count your coins before you even knock on that door.

Explorer Tom Fairy fort / earthern ringfort in Garrysallagh has three banks and a causeway at the east, plus some stone foundations that might be a hut or just rocks. It’s definitely winning the 'most complicated dirt circle' prize. Bring a camera and your most suspicious face.

Explorer Tom Mullaghmeen Forest’s name basically means “The Hill Where The Sheep Went To Die” if you squint really hard at the map. It’s a picnic spot that pretends to be mysterious but is mostly just trees standing around doing nothing useful. Bring a pen pal, they'll be jealous.

Explorer Tom Sheela-na-gig in Kilmore was found in a medieval church and now lives in a museum, looking utterly unbothered by it all. She's seen some things, and she doesn't care what you think. Bring a camera and your most suspicious face.

Explorer Tom European Yew in County Meath witnessed a love story that went horribly wrong right next to its trunk. The poor tree is still flinching from the drama. It's free, it's odd, what more do you want?

Explorer Tom Common Lime in County Meath would teach history by dropping leaves on your head until you memorised the dates. It’s got more patience than most teachers and twice the attitude. Pop by and tell it it's looking well.