Swedes go wild for elderflower. It wasn't until I had a German girlfriend that I learned that you can make a delicious compote out of the berries too.
In Sweden if you buy "fläder" anything, it's always made from the flowers.
But it's not exclusive to Sweden. I've had a few Scottish elderflower ciders, which taste great too.
If you haven't tasted elderflower, I don't know how to describe it. It's a unique flavor, part harsh, part refreshing, a bit fruity.