France, Languedoc-Roussillon
http://www.masamiel.fr/en/

Mas Amiel is a vineyard just outside the village of Maury, North-East of Perpignan. Planted predominantly with Grenache, the estate is best know for the production of its Vin Doux Naturel, Maury, a sweet 'oxidised' wine which is aged outdoors in large glass demi-johns before being transferred into large oak barrels to age.