There's a reason we pay top dollar for Champagne and that bottles of wine from prestige vineyards cost as much as a car: a place's distinct geographical attributes, known as terroir to wine buffs, determine the unique profile of a wine-and some rarer locales produce wines that are particularly coveted. In Volcanoes and Wine, geologist Charles Frankel introduces us to the volcanoes that are among the most dramatic and ideal landscapes for wine making.