Explore the world's great wine regions

A wine region is a geographically defined area recognized for producing wines with shared characteristics — shaped by a combination of climate, soil, topography, and centuries of human practice. These characteristics are collectively called terroir, a French concept that captures the idea that where a vine grows determines what ends up in the glass.

Within each region, smaller sub-zones called appellations (or denominations, depending on the country) draw tighter boundaries around areas whose wines are even more distinctly defined. In France these are called Appellations d'Origine Contrôlée (AOC); in Italy, DOC or DOCG; in the United States, American Viticultural Areas (AVA). Each system has its own rules, but the underlying goal is the same: to guarantee that a wine labeled with a place name actually comes from that place and reflects its character.

Boundaries are set by government bodies — national or regional agricultural authorities — after evaluating petitions from growers and producers. The review typically examines soil composition, elevation, rainfall, temperature ranges, and the historical record of grape growing in the area. In older wine countries like France, many boundaries trace back to medieval monastery vineyards and have been refined over centuries of observation.

In newer wine countries like the United States and Australia, the process is more formalized and petition-driven. A producer or group of producers submits evidence to the relevant authority — the TTB in the US — demonstrating that their proposed area has distinguishing geographic features and a coherent wine identity. Boundaries can be as broad as a multi-county region or as tight as a single hillside.

Appellation rules also vary widely. Some, like Burgundy's Grand Cru system, dictate precisely which grape varieties may be grown and how. Others, like many New World AVAs, only require that 85% of the fruit in a bottle comes from within the named area.

Understanding where a wine comes from tells you a great deal about what it will taste like, how it was made, and how it will age. A Cabernet Sauvignon from Napa Valley and one from Bordeaux share a grape but not much else — different soils, climates, and winemaking traditions pull them in opposite directions in the glass and in the cellar.

Appellation knowledge also helps you navigate pricing and cellaring. Wines from highly regarded appellations — Pomerol, Burgundy, Willamette Valley — command premiums because demand has validated their reputation over time. Knowing the hierarchy lets you spot value in lesser-known neighbors that share similar terroir.