Graham's wines are all made from grapes taken exclusively from five mountain vineyard estates spread across the Douro Valley. Each one has a unique aspect, soil composition and microclimate. The five properties are Quinta dos Malvedos and Quinta do Tua (both in the heart of the Douro Valley on the north bank), Quinta das Lages (in the famous Rio Torto Valley), Quinta do Vale de Malhadas (high up the Valley in the Douro Superior) and Quinta da Vila Velha (on the south bank of the River). Charles talks eloquently about the different characteristics that each one of these Quintas (vineyard estates) brings to Graham's Vintage Port.