These hillside cellars were built in 1850 on a site where the Romans had cultivated vines and cellared wine. The Kupferberg family expanded, creating 60 seven-story-deep vaulted cellars—the deepest in the world. The winery has a splendid collection of glassware; posters from the belle epoque period (1898–1914); richly carved casks from the 18th and 19th centuries; and the Traubensaal (Grape Hall), a tremendous example of the art nouveau style. Tours lasting
from 1½ to 2 hours are offered most Saturdays and some Wednesdays and Fridays in summer and fall, and include several glasses of sparkling wines and champagne. Online reservations are required. The Kupferberg Terrassen restaurant ($$$) here is a lovely place to dine before or after your tour.