Madeira wine is a fortified wine produced on the Portuguese island of Madeira. It is known for its unique aging process, which involves heating the wine and exposing it to oxygen, resulting in a rich, complex flavor profile. The wine can be made from various grape varieties, including Sercial, Verdelho, Bual, and Malmsey, each offering different sweetness levels. This wine has a long history, dating back to the 15th century, and was popular among explorers and traders. Madeira wine is often enjoyed as an aperitif or paired with desserts, and its remarkable longevity allows it to age well for many years.