can you name some its old world producers?
English wine producers, German wine regions
Cabernet Sauvignon
In the United Kingdom, English wine producers have experimented with growing the variety in plastic tunnels which can create a greenhouse effect and protect the grapes from the less than ideal climate of the wine region. While the grape is permitted to be planted in some German wine regions (such as the Mosel), the vineyard sites best suited for ripening Cabernet are generally already occupied with Riesling; many producers are ill-inclined to uproot the popular German variety in favor of Cabernet Sauvignon. 
where do the best cabernet sauvignons come from UNANSWERABLE what is it? It is one of the world's most widely recognized red wine grape varieties. where are they found? It is grown in nearly every major wine producing country among a diverse spectrum of climates from Canada's Okanagan Valley to Lebanon's Beqaa Valley. can you name some towns found in this valley? Zahlé,  Anjar,  Arab are there any landmarks here? The ancient Roman ruins of Baalbek, an ancient city named for the Canaanite god Baal. The Romans renamed Baalbek "Heliopolis" and built an impressive temple complex, including temples to Bacchus, Jupiter, Venus, and the Sun. do illicit things take place in this valley? Yes,  Drugs have a long tradition in the Beqaa Valley. do these cabernet also come in a different colour? UNANSWERABLE how is it related to oak? In winemaking, the barrels are made of oak which will have a strong impact on the resulting wine.
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Cabernet Sauvignon [SEP] Other Old World producers
In the United Kingdom, English wine producers have experimented with growing the variety in plastic tunnels which can create a greenhouse effect and protect the grapes from the less than ideal climate of the wine region. While the grape is permitted to be planted in some German wine regions (such as the Mosel), the vineyard sites best suited for ripening Cabernet are generally already occupied with Riesling; many producers are ill-inclined to uproot the popular German variety in favor of Cabernet Sauvignon. In the 1980s, inexpensive Bulgarian Cabernet Sauvignon was highly touted for its value and helped to establish that country's wine industry and garner it more international presence in the wine market.