Tayto Crisps are very popular in Ireland and the rest of the British Isles. The Taytos for Northern Ireland are made in "Tayto Castle"! Tayto Castle tours are open year round.
You might've guessed there was a St. Patrick's cathedral somewhere in Armagh, but two of them? That sounds crazy, but it's true. Armagh is actually the only city in the world to have two cathedrals by the same name!
Armagh is famous for it's apple orchards. That's why it is recognized as "The Orchard County"
The first ever summit canal in all of the UK and Ireland was the Newry Canal! It was completed in 1741, but due to poor condition, it was closed in 1949.