stumble across

Spend enough time scrolling online, and you’re bound to stumble across a photo of a mega-rest stop in Breezewood, Pennsylvania.

"It's scary to think that there are places where this dangerous material is just being dumped and members of the public aren't aware aware of it, that anybody could just stumble across."

Ofcom, which estimates about 14 million people watch online pornography in the UK, says tougher age checks will make it harder for children to stumble across harmful material online.

Once Ellie and Dina stumble across a cluster of massacred men, women and children in a Washington state forest, the righteousness of their mission grows clearer.

“And if you go there, you’re not going to know that unless you stumble across these two buildings and then learn the story, because everything, with the exception of these two buildings, has been cleared away.”