One day, a woman from Dull visited Boring on vacation, and inspired by the sense of connection, asked the town councils if they felt like spicing things up.

Now Dull, in Perthshire, Scotland, is officially a sister city of Boring, Oregon, and mastermind of the project Elizabeth Leighton says it has made Dull a more lively place to live.

With a population of just 85, Dull jumped at the idea which Elizabeth says it has brought a 'flash of excitement' to the tiny village ten years on.

Dull has seen a surge in visitor numbers since 2012 and even had tourists from Boring come to celebrate the match.

"I was going through Boring and saw the sign [and sent] my friend who was living in Dull a message saying, 'isn't this amazing, I'm in Boring and you are in Dull,'" said Leighton.

"It really increased the number of visitors, and you can see people stopping to take selfies with the road sign. There have been exchanges, with people from Boring coming here for celebrations."

Dull's main businesses are guest lodges and chalets, aimed at the tourism market, as well as Highland Safaris.

Boring was named after William H Boring, an early resident of the area and former Union soldier in the American Civil War, and has a population of nearly 8,000.

"They are both quite rural places and do have similarities," added Leighton. "Boring is bigger, but that doesn't make it more exciting."

In 2017, the mayor of a town called Bland in New South Wales, Australia, decided they wanted to get in on the act, and together suggesting the towns could be known as the 'Trinity of Tedium.' Other US towns like Dreary and Ordinary have also been touted as potential partners.

However further town-twinning hasn't taken off. Dull and Boring remain exclusive.

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Editor's note: This story has been changed to correct the position of Dull to Scotland.