932 Freeport Rd, Waterworks Mall Pittsburgh PA 15238 (map it!) http://burgatorybar.com/
This gem of a location in the Fox Chapel suburb of Pittsburgh is probably one of the most unique burger joints I've ever been to. I have never been so tempted by their veggie burger, which boasts a ton of fresh ingredients, and result in a tender wonderful flavor that would impress anybody. They have a wonderful selection of Bison, beef and other burgers with a whole menu of add-ons including things like wasabi avacado spread, banana ketchup and others.
I was particularly driven to try their "apple cinnimon pancakes with bacon" milkshake, which was over-the-top amazing. If you happen to travel near this spot, make sure you take the time. The 1-2 hour wait at dinner time is worth it.