Fronsac's fine Château Dalem perches high on a hill, surrounded by its 14 hectares of sloping vineyards. It's an historic estate, with records dating back to 1610, that stayed in the same family until 1955. Michel Rullier then took it over and today it's run with great success by his descendant, Brigitte Rullier-Loussert. Its vineyards are nearly all planted to Merlot, with a small amount of Cabernet Franc, and tended with meticulous care.

As you can see from critics' scores (92 points from James Suckling and 94 from Vertedevin), it is an admired claret and one that ages very well too. Matured in French oak (50% new), it has structure and length, but above all an appealing fruity depth. Perfect with roast meat or wild mushroom risotto.

Until 1997, Château Haut Brisson was an 8-hectare estate in the Vignonet section of Saint Emilion. New owner Peter Kwok was keen to expand its vineyards and the range of terroir, so began to buy up vine parcels to make it up to the 18 hectares it has today. Judging by today's scores and the quality of the wine, Kwok purchased wisely and quality has soared. Today it is under the ownership of Stephane Schinazi and continues its stellar projection, with Michel Rolland as consultant.

All its top grapes go into this wine (they no longer make La Réserve), ageing 30% of it in new French barriques, so as not to overwwhelm the fruit with oak notes. Now certified organic, with the aim of going biodynamic too, the 2020 is a magnificent wine.

The label's also been a favourite of the papacy since 1958, when Pope John XXII blessed Cuvée du Vatican. Their gorgeously rich and spicy Réserve Côtes du Rhône is a delicious way to experience this very fine estate at an excellent price. Look forward to red berry jam, tobacco, wood smoke and wild herb complexity. Superb.

When I came over the high pass south into the Agly Valley in the 70s, I was captivated by the ancient vines on steep, terraced hills, topped by high, ruined castles. It was wild 'unknown' territory. That's where bestselling Cabalié, made by the legendary Hervé Sabardeil, is from. Hervé buys grapes for Cabalié from many vineyards, but the best grapes came from two vineyards of 100-year-old vines on schist/granite soils. They are two of France's oldest vineyards, lying on steep, terraced hillsides. When Hervé learned the farmer was retiring, he bought those two vineyards – and thus we have the 'Grand Cru' Origine … the purest essence of Cabalié … made solely from those two vineyards. It's a nearly all dark, spiced Carignan, with a few rows of silky Grenache, Syrah and Mourvèdre, which add to the incredibly rich fruit and luscious texture.

This is one of those 'under-the-radar' regions I love to search out, home to the finest quality wines, but not so well-known. As Wine International says, "If it weren't for the [political] line dividing Castillon from Saint-Émilion, its wines would be twice the price. The hills are the same, the soil is the same, the exposure is the same." The estate has won over 150 awards, including the Paris Lauréat Prix d'Excellence – not once, but twice – and Decanter magazine calls it the "leading estate in the Côtes de Castillon". La Clarière is our flagship wine and absolutely no expense is spared. Low yields, careful hand-sorting, months ageing in the finest new French oak, and rigorous tasting ensure only the best parcels become La Clarière. Mostly Merlot, silky, elegant, and supple, with a dash of Cabernet Sauvignon for structure, and slightly portioned Malbec and Cabernet Franc for balance. It's truly magnificent!