We have had the good fortune to travel to plenty of wine growing areas:
Australia: Hunter Valley, Canberra, McLaren Vale, Yarra
USA: Napa, Sonoma, Monterrey, Santa Barbara, Temecula
Alsace, Loire (Saumur, Anjou, Chinon, Pouilly sur Loire, Sancerre), Champagne, Cote d’Or, Macon, Rhône, Languedoc, Rousillon, Collioure/Banyuls.
Most of these were just places we wanted to be for other reasons or were en route to other destinations. The ones that were deliberately chosen for the wine were Alsace, Mosel, Champagne, Cote d’Or (a cycling holiday!), Rioja, Pouilly.
We do enjoy going to areas where there happens to be local wine to try and that’s not hard in France and northern Spain. Mostly we are chasing decent weather! Regarding the Algarve we have been a few times over the years and until a recent trip in 2016 the local wine was not very good at all. But now they are really getting serious and there are some wineries producing excellent quality stuff.