The city's Champagne cellars are in fact 250 km (155 miles) of galleries quarried out of the city's chalk foundations back in the days of Roman Gaul.
There are champagne cellars that are deep underground.
mnli hypothesis: There are champagne cellars that are deep underground. premise: The city's Champagne cellars are in fact 250 km (155 miles) of galleries quarried out of the city's chalk foundations back in the days of Roman Gaul.