No matter what you're a world champion in - be it shove ha'penny, darts, whatever - it's a unique achievement.

This was, however, a unique achievement.

He calls it a 'unique achievement', adding that it has 'possibly greater significance than any of my other accomplishments'.

Rarely seen synergy of such music pedagogue and conductor and the singers of klapa, brought the unique achievement in the history of klapas singing and contesting.

His work deals with unusual cultures and humans living under extreme conditions or travelers making unique achievements in the sense of reaching unusual destinations.