Abbey Burgers - Baltimore, MD

From a USA Today survey:
"In Baltimore's restaurant-abundant Federal Hill neighborhood, The Abbey Burger Bistro has a patty for every taste: Black Angus beef, bison, lamb, ostrich and turkey. The build-a-burger menu offers cheese (including brie, Swiss, blue, American), avocado, peanut butter, truffle oil, a fried egg - along with the usual suspects. Bread is an English muffin, toast, pita or a good old bun. If you'd like a shake, try the one with vanilla ice cream, vodka and Godiva liqueur."