I know that, if you're not from Memphis, this sounds a little lame, but I don't care. Memphis has the best tap water in the country, and assignment #164 in the 365 Things to Do in Memphis is to drink it.
It's easy to forget how great our water is when you drink it every day. Usually, it hits me whenever I leave town and fill up a glass from a hotel room tap. When you're used to Memphis' super clean water, everything else just tastes kind of funny.
Here's why it's so good: Memphis water comes from a huge underground aquifer (not the Mississippi River, as a lot of visitors seem to think). When you turn your tap on to brush your teeth, the water that comes out is the same stuff that big companies bottle and sell in vending machines.
As a bonus, good water makes even better beer.