A trip to Épernay is a must while visiting Champagne Region.
It hosts many of the well known champagne houses like Moet & Chandon.
It's a pretty impressive sight, the street is very elegant and the architecture imposing, the majority of the champagne houses look like palaces. Tasting the champagne is easy, each house has a boutique where for twelve or fifteen euro you can taste one to three glasses.
It's one of my favorite places in France.