Mendoza has nearly 700 wineries, you can get some advice on the best ones to visit (or the tour companies that can help you decide) by visiting TripAdvisor's Mendoza forum and searching for the keyword "wine".
 

Wineries

Pulenta Estate Winery

Located in Alto Agrelo, Luján de Cuyo, Mendoza, Argentina, one of the most prestigious winemaking areas of the province.
135 hectare-vineyard grows at 980 metres above sea level and enjoys an extraordinary climate and huge temperature ranges, all of which create favourable conditions for an adequate ripening of the grapes.
The vines, which were especially brought from France and Italy and planted by Antonio Pulenta, flourish at the feet of the majestic Andes Range. Meltwater flowing from the mountains irrigates the Estate and its purity is reflected in the vigour, intensity and freshness of the fruit. The austere, restrained winery building stands among vineyards. Every detail in it responds to philosophy of vigilant attention to environmental care and is directed to the production of great wines by the combination of  traditional styles and ultramodern technology www.pulentaestate.com

Hacienda del Plata

For those of you looking for a unique and authentic Argentine winery experience, you will find it at Hacienda Del Plata. A traditional Gaucho family with strong ties to the mountains and the land, this visit will transport you back to Argentine roots. See how the family has evolved and how the family traditions still run strong to this day, and taste the memories of family and land coming through in the wines they make. You will be impressed with the warmth and hospitality shown here, the beauty of the property and the quality of the wines. Truly a visit worth making.

Bodega Rucal Malen

A relatively new winery in Mendoza, they have an expansive estate and are open to visitors for tours and tastings.


Tour companies

These companies provide upscale wine tasting tours in English

Ampora Wine Tours

Mendoza Holidays

Enjoy superb wine-tasting experiences at famous wineries, many of which are not usually open to the public. You will also enjoy lunches, dinners, and informal picnics. Traveling with Mendoza Holidays will give you the exclusive opportunity to enjoy great and extensive wine- tasting as exclusive guests of the estates, which you cannot experience traveling by yourselves. Travel itineraries are well organized and touring time includes wine tasting as well as free time and visits to places of interest. Private, personalised luxury service.