Three young adults work together in a warehouse, measuring and packaging items at a table surrounded by boxes and equipment.
Celestial Seasonings started in Boulder in 1969, and early on bagging crews (from left Patty Cowen, Kathy Vail, and Bill Hoke) worked to fill orders. (Photo courtesy Carnegie Library for Local History, Boulder)

Don’t be lulled by Celestial Seasonings’ adorable address — 4600 Sleepytime Drive. The tea company’s Boulder HQ is as bustling as any brewery could be on a Saturday afternoon. A popular tea tour takes you through the factory’s innards, where you can learn more about how they’ve gone from foraged herbal blends in hand-sewn muslin bags to serving up more than 1.6 billion cups of tea per year. If you don’t have time for a tour, visitors are still free to enjoy the tea room and gift shop, where you can sample dozens of signature tea blends, including the one that launched Celestial Seasonings to its global success: Sleepytime Tea.