I love this kind of thing...

My dad was the product of a liason between his teenage mum and an Italian POW in Wales. Cut a long story short, my family met the italian family about 6 months after i left the country (so I've yet to meet them).
Dad has a wonderful relationship with that side of his new family though his dad died some time ago. it's been a real eye opener.

More recently, my nan would tell stories of an aunt who went to australia (from wales) when nan was a child.
Anyway, cut another LONG story short, I found the passenger list, the electoral rolls and the house where they moved to.
I always kinda looked up to this aunt; she'd made the same journey as me though undoubtedly my trip on a plane was better than hers on a boat.
It was with huge sadness that i learnt before christmas that, having been in Oz for 30 years and raised a family on a successful farm, she actually took her own life, and that's why the trail ended where it did.
I then started looking into her children and found out that one of her sons also took his own life. So maybe they weren't so happy after all.

I can trace my lot back to great great great great great great grandparents.

Ancestry dot com is good for finding UK people. Take the free trial, use it to the max then cancel it before 14 days.