Each vine in La Geria grows at the bottom of a hollow, some three metres across, dug by hand into black volcanic gravel. The hollows are called hoyos. Around each one stands a low crescent wall of stacked lava stone, a zoco, built to break the trade winds. There are thousands of them. From the LZ-30 the valley reads as a field of dark craters, regular and deliberate. Travellers who book Wine Tasting Lanzarote Costa Teguise tours cross from coastal hotels into this terrain in under thirty minutes. The landscape is the product of catastrophe. Between 1730 and 1736, fissure eruptions along the Timanfaya line buried roughly a quarter of the island under lapilli, the pea-sized ash that islanders call picón. Farmland vanished. What remained was a mineral mulch that traps night moisture and releases it slowly to the roots below. Vines planted into it need no irrigation. Lanzarote receives under 150 millimetres of rain a year; the picón does the work the rainfall will not. Malvasía volcánica dominates the plantings, with listán negro, moscatel and diego alongside it. Phylloxera never crossed to the island, so the vines sit on their own roots, ungrafted, a rarity in European viticulture. The Denominación de Origen Lanzarote, recognised in 1993, now covers around 2,000 hectares across La Geria, Masdache and Tinajo. Most routes sold as a Wine Tasting Lanzarote Costa Teguise tour cross at least one of those three zones. At Km 11 of the LZ-30 stands El Grifo, founded in 1775 and the oldest working bodega in the Canary Islands. It anchors most Lanzarote volcanic vineyard itineraries. Its grounds hold a museum of nineteenth-century presses, a vaulted cellar cut below ground level, a cactus garden, and a specialist library of several thousand volumes on wine. César Manrique reworked the house label in the 1970s, and the griffin he drew still appears on every bottle. The old lagares were cut for foot-treading; the modern winery works beside them rather than over them. La Geria today is a working agricultural district, not a display. Its walls are rebuilt each season by hand because machinery cannot enter a hoyo. That is the context behind Wine Tasting Lanzarote Costa Teguise: a resort coastline thirty minutes east, and here, a landscape assembled stone by stone over three centuries. A cata de vinos en La Geria is, in effect, a reading of the wine country landmarks that surround the glass.