This is the summer drink of my childhood.
source
It is a traditional Romanian soft drink made from elderflowers, lemons, sugar and water. You simply put some large elder flowers, lets say 5-10 in a 5 l jar, add 2-3 sliced lemons and fill with water. You cover it and leave it for a day, then add half a kilo of sugar and then leave it in a sunny spot for around 4 days, stirring the mix each day. Some people would add some yeast as well or some rice grains to aid the fermentation.
You then strain it, bottle it and leave it in a dark place. Be careful though, this is a slightly fermented drink, so although it is non alcoholic to start with, it will carbonate with time so don't shake the bottles when you get them out. I've also heard stories of people forgetting about the bottles for years and then getting drunk after enjoying this refreshing lemonade :D
As kids, we were always waiting for the elderflowers to form and picking bags of the stuff to bring home to our mother, who through magic, was turning them into this delicious drink. The worst part was waiting for the better part of a week to drink it.
And guess what I found today in a shop around here?
I got home and
It's not as good as my mom's obviously but it's still a nice refreshing drink.
I'm sure 
I know that in the UK people make elderflower champagne which is a similar drink, alcoholic though.
Now I'm really curious in what other countries you can find this drink or something similar? 
How about our southern brothers 
Cheers
Cos