Could you pinpoint Slieve Gullion on a map?
Before last week, I couldn't.
I had a vague idea that it was in South Armagh, but it wasn't until I literally pinned it in Google Maps that I zeroed in.
Less than 10 minutes off the N1/A1 between Dundalk and Newry, I pulled up at the eroded heart of an ancient volcano.
I spent an hour or so off-road, exploring a landscape where CS Lewis once wandered amid stone tombs and legends of Cúchulainn and the Cailleach Beara.
Walks and a scenic drive lead to views over several counties, and a 'Giant's Lair' story trail by the forest car park is a toddler-friendly loop riddled with fairy doors, fantasy sculptures, tree stumps to climb and wicker tunnels to walk through.
Could you pinpoint Killeavy Castle Estate?
It's a new hotel, spa and walled garden café built around a polished restoration on the slopes of Slieve Gullion. I'd never been, but by the time I left, an area we once called 'Bandit Country' had been brought to life in a whole new way.
This week, Tourism Northern Ireland launched a spring campaign - 'Embrace a Giant Spirit' - to drive awareness in the Republic.
For all the Brexit talk, cross-border travel has never been easier, thanks to free mobile roaming, contactless payments, good value (despite fluctuating exchange rates and a 20pc VAT rate, I always seem to spend less on food and drink in Northern Ireland) and experiences ranging from Seamus Heaney's HomePlace to hikes on the Causeway Coast.
Slieve Gullion is just 25 minutes from Dundalk; Belfast now two hours from Dublin.
And yet... driving here last week underscored the stubbornness of set thinking. Why do Belfast or Derry feel further than Galway or Cork? Why do I think of the 'Troubles' gliding across an invisible border?
Why do maps of Ireland still show blank space north of that squiggly line?
In 2016, Tourism NI undertook research to find out why southern visitor numbers were slipping and help reverse the trend.
"People seemed to think Northern Ireland was far away," its CEO, John McGrillen, tells me.
Numbers have since returned to growth, and game-changers like Titanic Belfast, Game of Thrones, Derry Girls and Shane Lowry's rapturous reception after winning the British Open at Portrush have changed perceptions.
But blocks remain. I know, because I have them.
That's why I love travel. There's no purer way to kick back, escape the everyday and pry open our nine-to-five minds than by pinpointing new stuff and setting out on journeys to see it. 'Blank' maps can sound forbidding. I'm trying to see them as 'undiscovered' instead.
And sometimes, those discoveries are closer than we think.