In Épernay, taking a detour down this street is a must—and you’ll understand why as soon as you hear its name. This is where the legendary champagne houses that built the city’s reputation, and that of the entire region, are located. It's such an iconic place that in 2015 it was added to the UNESCO World Heritage list under the title “Champagne Hillsides, Houses and Cellars.” Let’s rewind a bit and take a quick look at its history. Back in the Middle Ages, this road was known as Hospital Path and lay outside the city walls. In the 16th century, it took on the curious name of Folie Street. Locals claimed the name came from the hospital that housed the mentally ill, but it was more likely due to the presence of a grand mansion—what people at the time called a “folie.” That mansion still exists today, and it’s actually a champagne house. After the Revolution, the road was renamed Commerce Street, and what was once a simple path slowly transformed. Little by little, wine merchants and cellars moved in, and elegant mansions and even châteaux began to rise. Over time, this stretch became one of the most prestigious streets in all of France—over a kilometer of impressive residences, each one grander than the next. We’ll explore a part of it together, but if you have time, it’s worth walking the whole thing to see all the champagne houses. And here’s something incredible: the street’s opulence doesn’t stop at ground level. Beneath your feet lies a vast underground labyrinth of chalk cellars and tunnels, stretching for miles and holding over 200 million bottles of champagne. These underground galleries are open to visitors, but you’ll need to book a cellar tour with one of the houses. Along this avenue, you’ll find names like Moët & Chandon, Perrier-Jouët, Boizel, De Venoge, Vranken, Pol Roger, Mercier, and G.H. Martel. Even though wars have repeatedly damaged the avenue over the centuries, it’s always been carefully rebuilt to preserve its grandeur. Today, it’s home to two listed Historic Monuments—the Town Hall and Château Perrier—and it proudly bears the “Remarkable Taste Site” label for the excellence of its champagnes. And if you happen to be here in December, don’t miss the “Habits de Lumière” festival. For one magical weekend, the avenue comes alive with light shows, video projections, street performances, and champagne bars, attracting more than 40,000 visitors. It’s a truly unforgettable experience. Now go ahead—walk on and take it all in…