Durfthaus 4711
The original "eau de Cologne" was first produced in the city in the early 18th century from an Italian formula. It's made from a secret formula and aged in oak barrels. The most famous cologne is 4711, which derives its name from the firm's address. The building itself is equipped with a carillon, a museum, a "fragrance fountain," and (naturally) a gift shop. The scent, primarily derived from citrus, rosemary, and lavender, may seem old-fashioned to some, but it comes in an elegant bottle with a turquoise-and-gilt label, and makes a nice souvenir.
