No wonder everyone in Boulder seems so relaxed: The city is home to North America's largest producer of herbal tea, which packages and sends more than 8 million tea bags every day. Founded in 1969, Celestial Seasonings has since grown to serve more than 1.6 billion cups of tea (including green, red, white and chai varieties) a year to consumers all over the world.

Recent visitors agree that a tour of the Celestial Seasonings Tea Factory is well worth the time, even if you're more of a coffee person. You'll get the chance to see the entire packaging process, not to mention the Celestial Herb Garden and the popular Mint Room, where the company stores giant bags of spearmint and peppermint tea. (Recent travelers delighted in the chance to see how long they can bear the powerful aromas before they need to step out for some fresh air.) Plus, you'll have the opportunity to sample some of the factory's best-sellers. If you're not already sold, keep in mind that the tour (and the tastings) is completely free.

Located in northeast Boulder – adjacent to the Leanin' Tree Museum of Western Art – the Celestial Seasonings Tea Factory welcomes tea lovers every day (hours vary depending on the day) with 45-minute tours running every hour on the hour between 10 a.m. and 4 p.m. (between 11 a.m. and 3 p.m. on Sundays). You can also simply pop in for a complimentary taste anytime between 9 a.m. and 6 p.m. Monday through Friday, 9 a.m. and 5 p.m. on Saturdays, and 10 a.m. and 5 p.m. on Sundays. For more information, check out the factory's website.