Just got caught falling down a rabbit hole thinking about wines that aren't necessarily produced regularly and can demonstrate the power of truly amazing vintages (or try to- we've occasionally seen some of these turn out to be mistakes on the parts of the hopeful producers).
Beyond d'Yquem, Vintage Port, and some top-tier Champagnes (Salon, Clos de Mesnil, etc..), what wines do ya'll think of when you consider this special/unusual category?
Giacosa's Collina Rionda was in this category, but is no longer produced.
Good call! Additionally, shouldn't all of the Giacosa Riservas be added to this list? Those are all only a few times a decade.