I won't try to play it cool with this one; Lopez de Heredia is one of my very favorite wineries on Earth! They consistently produce some of the most complex and long-lived wines from their own vineyards in Rioja. Examples of their offerings from 50+ years ago can still impress today (if you can get your hands on them!). While they are known for world class reds, they also make this unique example of a White Rioja. Like all of their wines, the Gravonia is aged for a LONG time before release. 100% Viura that spent 4 years in barrel (being racked twice a year and fined with fresh egg white in one of the most traditional methods). After its time in barrel it was allowed to rest in the bottle until release. The result is a very dry white with enormous complexity on both the nose and palate. Properly stored these wines will continue to age gracefully in the cellar for at least a decade, but they really ought to be experienced if you haven't tasted them before.