Madeira and southern Portugal. Fortified history, sandy vineyards and sunny blends.

Madeira: the wine that went on a voyage

Madeira is a volcanic island in the Atlantic, about 1,000 kilometers southwest of Lisbon. In the age of sail, ships stopped here to load wine. To keep it stable on long voyages, producers began adding spirit, and the story goes that wine that came back unsold had been improved by the heat, movement and oxygen of the journey. Some was sent across the equator and back on purpose, as vinho da roda, the wine that made a round trip.

Today that effect is recreated at home. In the estufa system, heated pipes speed up maturation, while the better wines use the canteiro system, aging naturally in casks under sun-warmed roofs. Heat and oxidation give Madeira its color and its notes of hazelnut, walnut, coffee and burnt caramel, while high acidity keeps it fresh. Madeira is fortified to around 17 to 22% alcohol, and once opened it keeps for a very long time.

The four noble styles

At the top of the quality scale, four styles are named after their white grapes, ranging from dry to sweet: Sercial, Verdelho, Bual (Boal) and Malmsey (Malvasia). Most Madeira today, around 85%, is made from Tinta Negra, which can be made in every style, with terms like extra dry or rich on the label.

Hosts Peter Richards MW and sommelier Paz Levinson taste a Sercial, a Boal from Barbeito and a Malmsey side by side, and Paz suggests pairings for each, from tartare with a little spice to blue cheese and dark chocolate. It is a great lesson in matching sweetness and acidity.

Lisboa: Bucelas and Colares

Near Lisbon, the Lisboa region has a mild Atlantic climate. Bucelas is protected from Atlantic winds by the Serra de Montejunto and is known for whites made mostly from Arinto, a high-acid grape with lemon, grapefruit, stone fruit and mineral notes. The hosts pair an oak-aged Bucelas with grilled sardines.

On the coast northwest of Lisbon, tiny Colares is one of Portugal's most remarkable vineyards. Vines grow in sand, where phylloxera cannot thrive, so many are old and ungrafted. Reds from Ramisco have high acidity, firm tannins and low alcohol and need time; whites come from Malvasia de Colares. Today only a handful of producers remain, threatened by real estate development. Paz shares a memorable story about old Colares bottles found in a restaurant cellar.

Alentejo: cork, clay and blends

Inland, Alentejo covers about a third of Portugal, a land of wheat fields, olive groves and cork oaks. Southern Portugal produces more than half of the world's cork, which is why Paz arrives with a cork yoga mat. Some producers still mature wine in talhas, clay vessels used since Roman times. The hot climate gives ripe, easy-drinking wines, and most are blends labeled simply Alentejo. Portalegre, in the cooler, higher northeast, gives fresher reds from old vines.

Key red grapes are Aragonez (Tempranillo) and Alicante Bouschet, a red-fleshed grape that adds deep color, often with Trincadeira, Syrah or Cabernet Sauvignon. For whites, Antão Vaz brings tropical fruit and takes well to oak, with Arinto and Roupeiro for acidity. In the blind tastings, wines from Herdade do Esporão and Cartuxa are in the line-up, and a red is matched with focaccia and porco preto sausage.

The experiment: heat, oxidation and color

How does Madeira turn brown? In a playful experiment, Peter writes a secret message in lemon juice and Paz reveals it with a hot iron, showing how heat speeds up oxidation and browning. Find out what the message says, and why controlled oxidation is a fault in most wines but the whole point of Madeira. The episode helps you prepare for WSET Level 3.