In Avengers: Age of Ultron, when Scarlet Witch tampers with Tony Stark's mind, he sees a nightmare of dead Avengers. There, you see Captain America's shield torn in half. It was like something cut it or broke it.
If vibranium is indestructible, then what could do this to the shield? Is there any weapon or person which is able to damage vibranium?
I'm not a fan of comics, so I don't know if there's been a mention of this.