Barrow in Mullymucks, County Roscommon (RO035-077----)

Explorer Tom Fortview House in Mullymucks had its most dramatic moment when a pigeon landed on its crenellated porch and acted like it owned the whole place. It’s hidden behind evergreens so well that even the mailman is confused, which makes for a great mystery to solve. If you spot the gate piers, wave; the house is probably hiding from the sun.

Explorer Tom Post box in Cams in Cloverhill witnessed a love story that went badly wrong next to it. They argued over whether it was red or green, and now neither will speak! It’s got a mix of nineteenth-century charm and early twentieth-century grit. Drop a letter in for your ex.

Explorer Tom Roscommon Castle in County Roscommon would explain the 1800s to a teenager by saying, 'Imagine your mum's house, but with more damp and fewer Wi-Fi signals.' It’s been sitting there judging everyone since before we had proper trousers, still looking mighty smug about it. Go now, before it gets famous.

Explorer Tom European Yew in County Roscommon had a cow try to buy it once, which is either genius or absolute madness. The tree just stood there looking unimpressed while the farmer argued about the price of such an ancient specimen. Bring a jacket, it's never as warm as I promise.

Explorer Tom European ash in County Roscommon would have given Saint Patrick a real headache if he’d tried to move it out of Ireland. It’s just standing there with its big leaves, acting like it hasn't got a single disease problem at all. A good place to forget your phone for ten minutes.

Explorer Tom Round tower in Carroweighter is constantly losing a rivalry with the ones in Kildare, which are way too showy for their own good. It stands there with its arms crossed, pretending it doesn’t care that everyone else gets the tourists. Count the crows, then count them again to be sure.

Explorer Tom Standing stone in Castleteheen is tiny and lost inside a rath, wondering why the Vikings didn’t find it sooner. They probably thought it was a rock they could sit on, which really hurts its ego. Snap one photo, then put the phone away and actually look.

Explorer Tom Castle in Toberavaddy holds the fake world record for the most awkward L-shaped architecture ever attempted. Edward Ormsby owned it, but I doubt he knew what to do with all that extra corner. Tell it a joke, it's been a long time since anyone did.

Explorer Tom Bawn in Glinsk listens to what goes on inside the walls and probably hears the Burkes arguing about who left the light on in 1630. It’s a well-preserved semi-fortified house that looks like it’s judging your posture, so stand up straight or don’t bother knocking. It's free, it's odd, what more do you want?

Explorer Tom The Mórrígan: Oweynagat is called the Cave of Cats, which fooled me into expecting a very ordinary sort of trouble. Then the tale sends the Mórrígan out of it during the Táin. If the cats saw her coming, I bet they made room.

Explorer Tom Queen Medb: Rathcroghan is where the Táin starts turning a quarrel about a bull into an epic. Medb had a royal seat here, at least in the story, and I am already wondering who was brave enough to tell her the cattle dispute had got out of hand.