I drank a 22 ounce bottle of Stone Old Guardian 2007 Barley Wine Style Ale last night. Barley Wine can be as strong as a wine, but is actually a beer. This stuff is 11.27% alcohol by volume, so it packs a wallop.
Stone Brewing Company is one of the best craft brewers in the country, and their brews can be hard to find. Luckily, there is a good liquor store next to the King Soopers on Jordan Road in Parker that carries their stuff. Highly recommended, if you can find it.