There is an amazing overview of what lambics are at the enclosed link.  If you read the link you may not be interested in trying one (if you haven’t before) as the process in which they are brewed is not what intuitively would produce anything edible.  However, I assure you, they are great.  Put a framboise in the cooler, perhaps a Lindemans, and when its cold pour youself a glass.  You will be amazed at how refreshing and clean it is.