Pottsville Brewery
The Pottsville Brewery is America's oldest brewery! Established in 1829, it's home to Yuengling Lager. You can tour some really cool hand-dug fermentation caves that were used to store the beer before refrigeration. If you plan on going with a larger crew, you have to call ahead and make a reservation for groups of 15 or more. Also make sure you wear closed shoes, or they won't allow you to tour the brewery.
Tour hours and more information can be found here!
[Photo via @riccia13]