This is nothing really compared to others I've seen on here..
But we went to Ireland on holiday about 15 years ago, and my mum decided to look for her grandad's grave, which she'd never seen, while we were there. We didn't have a great deal to go on, other than the general area. Didn't even know which church it would be at. We went to four churches, hunting round for ages, and found nothing.
We got to the fifth church (with a couple more still to try in the radius we'd set) and we walked in through the back, so couldn't see any writing on any of the gravestones.
Immediately, I just knew which one it was. I said thank goodness for that, I was getting fed up of graveyards, and walked towards a grave near the middle of the graveyard. My mum said don't be silly, you can't see it. I'll give you £1,000 if that's right. It was.
Now, okay, it might be a complete coincidence. But I just "knew". I don't know how, nobody had spoken to me or anything. But it would have to be a pretty big coincidence, as there were a few hundred graves there, and we'd had a list of 9 churches to try.
There have been a couple of similar things since that, where I just suddenly "know" things, and can't really explain why. Nothing major.