Here's something you (probably) didn't know: Memphis is home to an aquifer that purifies the city's drinking water through 850ft of fine sand and quartz, deeming it some of the cleanest in the country. Music to a brewer's ears (or just anyone who drinks water in Memphis, I guess). Ghost River Brewing Co. -- named after a section of the river that feeds the aquifer -- credits the drinking water as the secret ingredient to its high-quality brews. Its Downtown taproom has every Ghost River label on draft, and a changing roster of food trucks on site every day. For every barrel brewed, Ghost River donates money to support its beloved aquifer, so basically, any time you're drinking Ghost River beer, you're drinking for a good cause.